The number printed on the box is a machine-generated estimate, not a guarantee. It assumes a fixed draw duration, a fixed puff volume, and a room-temperature battery at full charge. Your draw is different. The Dhaka heat affects your battery. Your vaping frequency is different from the lab technician’s. When you pull a high-puff disposable out of a drawer in Mohammadpur and it dies four days before the box said it would, the problem is not that you were sold a defective unit. The problem is that the number was never a promise.
This article compares three devices currently in this market: the That.That 18K, the Elf Bar Pi9000, and the Upends CD30000. We looked at their verified specs, their vaping modes, what their batteries can actually sustain, and what a Dhaka buyer should physically check before they commit. Because at KandyVape, we do not accept returns. We would rather you understand what you are buying before you pay.
The That.That 18K, Elf Bar Pi9000, and Upends CD30000 are rechargeable high-puff disposable vapes stocked in Bangladesh. The That.That 18K carries a 630 mAh battery, 20 ml e-liquid, dual NexMesh coil, and three vaping modes (Eco, Normal, Turbo) delivering up to 18,000 manufacturer-rated puffs. The Elf Bar Pi9000 carries a 650 mAh battery and 18 ml e-liquid with a single mesh coil and no mode selection, rated to 9,000 puffs. The Upends CD30000 carries an 850 mAh battery, 20 ml e-liquid, dual mesh coils at 1.1Ω each, and three modes (Soft, Norm, Boost) rated to 30,000 puffs in Soft mode, 25,000 in Norm, and 20,000 in Boost. All three run 50mg salt nicotine and charge via USB-C. Prices for each are listed on the current product page. Puff counts are manufacturer-stated figures under laboratory conditions and will vary with real-world use.
Why Puff Counts Are Not Equal Across These Three Devices
The first thing to understand before comparing 9,000, 18,000, and 30,000 puffs side by side is that these numbers do not measure the same thing across all three devices.
The Pi9000 has one output setting. Every draw fires at the same wattage. The battery runs down at a predictable, linear rate. What the lab measured is roughly what you will get, with normal variation for draw style and frequency. The 9,000 puff figure is the most straightforward of the three.
The That.That 18K and the Upends CD30000 both have three vaping modes. The That.That 18K offers Eco, Normal, and Turbo. The CD30000 offers Soft, Norm, and Boost. On the CD30000, Upends publishes this explicitly on their official product page: Soft mode delivers up to 30,000 puffs, Norm mode delivers approximately 25,000, and Boost mode delivers approximately 20,000. The headline puff count of 30,000 is the Soft mode figure. If you vape primarily in Boost because you want the strongest hit, you are buying a 20,000-puff device, not a 30,000-puff device.
That is a 33% reduction from the box claim, and it is not a defect. It is a physics consequence of higher wattage output consuming more battery and e-liquid per draw.
The That.That 18K does not publish mode-specific puff count splits in its accessible documentation. The 18,000 figure appears to be the headline mode estimate, but we cannot confirm whether that is Eco mode, Normal mode, or an average. This is a spec gap. Until an official breakdown is available, treat the 18,000 figure as the maximum achievable in the most conservative mode, and expect fewer puffs in Normal or Turbo.
Real-world disposable puff count performance also diverges from lab claims based on draw length, ambient temperature, and how long the device sits idle between sessions. Published research from PMC documents that user puffing behaviour and puff topography frequently differ from laboratory standardised conditions, affecting vapour delivery and, by extension, liquid consumption rates.
Device Specs, Side by Side
Before discussing which device suits which use case, here are the verified numbers. Specs flagged as unconfirmed below are not stated as facts in this article. They are drawn from the best available third-party retail data.
| Specification | That.That 18K | Elf Bar Pi9000 | Upends CD30000 |
| Battery | 630 mAh | 650 mAh | 850 mAh |
| E-liquid capacity | 20 ml | 18 ml | 20 ml |
| Nicotine strength | 50mg salt nicotine | 50mg salt nicotine | 50mg salt nicotine |
| Coil type | Dual NexMesh (fixed) | Mesh (fixed) | Dual Mesh 1.1Ω + 1.1Ω (fixed) |
| Coil resistance | Unconfirmed | Unconfirmed | 1.1Ω each (partially verified) |
| Vaping modes | 3 (Eco / Normal / Turbo) | None | 3 (Soft / Norm / Boost) |
| Puff count | Up to 18,000 (mode-dependent) | Up to 9,000 | Up to 30K Soft / 25K Norm / 20K Boost |
| Charging port | USB-C | USB-C | USB-C |
| Airflow | Adjustable | Fixed | Adjustable |
| Display | Battery + e-liquid digital | Dual LED indicators | 3D curved digital screen |
| Activation | Draw-activated | Draw-activated | Draw-activated |
| Verification | PARTIALLY VERIFIED | PARTIALLY VERIFIED | VERIFIED (official upends.com) |
All three devices are sealed, non-refillable units.
There are no replacement coils, replacement pods, or refill options. When the e-liquid runs out, the device is spent. This is a fundamental difference from pod systems and should factor into your long-term cost calculation.
The e-liquid base in all three devices is a propylene glycol and vegetable glycerin blend carrying the salt nicotine. PubChem (NIH) classifies propylene glycol (CID 1030) as generally recognised as safe for food use. Inhalation is a different route of exposure from ingestion. We do not make any claim about the safety or harmlessness of inhaling any vaporised substance. The WHO’s Global Tobacco Epidemic 2021 report, available from the WHO publications library, states that nicotine is highly addictive and that use of e-cigarettes has been associated with concerns about nicotine dependence and effects on brain development in adolescents. We cite that finding as an objective statement from a named health body, not as an endorsement or refutation of vaping.
The That.That 18K: Where It Fits
The That.That 18K is a mid-range device by puff count, sitting squarely between the Pi9000 and the CD30000. Its 630 mAh battery is the smallest of the three, which raises a practical question for a device with 20 ml of e-liquid and three vaping modes: can the battery keep up with the liquid?
The answer depends heavily on mode. In Eco mode, a 630 mAh battery at the efficiency typical of a dual mesh coil setup should be rechargeable enough times to exhaust most of the 20 ml over an extended period. In Turbo mode, you are drawing more power per puff. A 630 mAh battery will reach depletion faster, requiring more frequent recharges. The coil resistance for the NexMesh dual coil is not published in any source we were able to verify, so we cannot calculate the exact current draw per puff. If you are a heavy user who vapes in long frequent sessions, the That.That 18K in Turbo mode will require recharging more often than the CD30000 under the same conditions, simply because the battery is smaller.
The dual NexMesh coil design generally improves vapour density compared to a single mesh coil at the same resistance, because two coils cover more surface area and saturate the wick more evenly. For a 50mg salt nicotine user, this means each puff delivers a denser aerosol. Whether that reads as a benefit or a drawback depends on your preference for throat hit intensity. A denser, warmer draw at 50mg can feel considerably stronger than a single-coil device at the same nicotine strength.
The digital display showing battery and e-liquid level is a practical feature. It removes the guesswork about whether the device is dying or empty. The adjustable airflow allows some control over draw resistance, which is useful if you find 50mg salt nicotine at a wide-open airflow to be too harsh.
Current price: listed on the product page.
The Elf Bar Pi9000: The Simplest of the Three
The Pi9000 is the lowest puff count device in this comparison, and it is also the simplest. No vaping modes. No airflow adjustment. You draw, it fires. Battery at 650 mAh is marginally larger than the That.That 18K despite rating to fewer puffs, which suggests the single-coil setup draws less power per puff. The 18 ml e-liquid capacity is smaller than both competitors.
The pillow-shaped body is ergonomic and pocket-sized. The dual LED indicators (one for battery, one for e-liquid) give basic status information without the complexity of a full digital screen. For a buyer who wants a disposable that requires no decision-making — no mode to select, no airflow to adjust — the Pi9000 is the appropriate choice in this comparison.
Elf Bar is among the most counterfeited disposable vape brands in the South Asian market. Every Pi9000 unit should be verified before use. Elf Bar maintains an official authentication page at elfbar.com/verify.html where you enter the security code printed on the packaging. A genuine first scan returns a verified authentic response. If the code has already been scanned, the packaging was already opened before you received it, or the unit is a fake with a recycled code. Physical signs of a counterfeit Pi9000 include slightly blurred print on the device body, LED indicators that do not match the colour sequence shown in official packaging photography, and e-liquid that burns or tastes flat within the first 100 puffs.
Note that the Pi9000 does not currently appear on elfbar.com’s live product list page. If you are ordering, confirm with us that the stock is current. We will tell you what we have.
Current price: listed on the product page.
The Upends CD30000: The Most Documented of the Three
The CD30000 is the device with the highest puff count ceiling, the largest battery, and the most official documentation. Upends publishes a dedicated product page at upends.com/disposable/cd30000 and answers the mode-specific puff count question directly in their FAQ. That level of transparency is notable and makes spec verification easier.
The 850 mAh battery is 220 mAh larger than the Pi9000 and 220 mAh larger than the That.That 18K. That difference matters for a device with a 20 ml e-liquid reservoir and two coils running at 1.1Ω each. At 1.1Ω, the CD30000 sits in the mid-to-high resistance zone for a dual mesh setup, which is appropriate for 50mg salt nicotine. Higher resistance means the coil draws less current per puff than a sub-ohm coil would, which is consistent with the longer battery life implied by the larger mAh and higher puff count.
The 3D curved digital screen is a hardware differentiator. It displays vaping mode, puff count (counting down from your starting total), battery percentage, and e-liquid level in real time. As Upends documents on their official product page, puff count is tracked digitally on-screen for each session. This is more informative than LED indicators and means you are never guessing how much is left.
The three modes are functionally meaningful rather than cosmetic. Soft mode at the conservative end of the power range produces less vapour per draw but stretches the e-liquid and battery to the maximum 30,000 puff rating. Boost mode fires at higher output, increasing vapour density and throat hit, but consuming e-liquid and battery at a faster rate and reducing the effective puff count to approximately 20,000. For a daily vaper who uses the device in a single primary mode, the choice of mode at purchase is a practical decision, not an aesthetic one.
The adjustable airflow on the CD30000 allows draw resistance tuning, which is useful when paired with 50mg salt nicotine, where a tighter MTL draw reduces the aerosol volume per puff and softens the throat hit.
Current price: listed on the product page.
Mode Selection and Puff Count: The Calculation That Matters
Most buyers anchor to the headline puff count without working through the daily usage math. Here is how to do it.
A consistent adult vaper who draws approximately 150 to 200 puffs per day is a reasonable baseline. That figure varies significantly based on whether the person is transitioning from cigarettes (tends to vape more frequently) or maintaining an existing habit.
At 150 puffs per day in a single mode:
- Pi9000 at 9,000 puffs: approximately 60 days, all else constant.
- That.That 18K at 18,000 puffs (conservative mode): approximately 120 days, all else constant.
- Upends CD30000 in Soft mode at 30,000 puffs: approximately 200 days, all else constant.
- Upends CD30000 in Boost mode at 20,000 puffs: approximately 133 days.
These are arithmetic estimates from manufacturer-stated figures divided by a usage assumption.
They are not tested results. Real durations will be shorter or longer based on your actual draw frequency, draw duration, ambient temperature (heat reduces battery performance), and how often the device sits at low charge before being plugged in. Express these as approximate ranges, not dates.
The reason we present the math is so you can decide which device makes sense per your estimated usage before ordering — because there is no refund if you pick the wrong one.
What 50mg Salt Nicotine Means Across All Three Devices
All three devices carry 50mg salt nicotine (5%). This is a high nicotine concentration and is intended for adult smokers or vapers who require strong nicotine delivery. It is not appropriate for non-nicotine users, and if you are currently a light smoker or someone who has not used nicotine products, 50mg salt in a dual-mesh coil at a wide airflow setting can produce a throat hit that is uncomfortable enough to cause you to abandon the device.
The WHO’s Global Tobacco Epidemic Report 2021 notes that nicotine in e-cigarettes is highly addictive. We are not in a position to advise on whether vaping is appropriate for you medically. If you are considering vaping as an alternative to cigarettes, that decision involves health factors that are outside the scope of a hardware comparison article, and we encourage you to consult a healthcare professional.
What we can note from a hardware perspective: at 1.1Ω on the CD30000, the coil resistance is in a range that delivers a somewhat cooler, denser aerosol compared to a sub-ohm coil. This affects how the 50mg nicotine strength is perceived at the throat. Tighter airflow and higher resistance both tend to moderate perceived harshness at high nicotine concentrations. The Pi9000 with fixed airflow and a single mesh coil produces a consistent, straightforward MTL draw. The That.That 18K and CD30000 both allow airflow adjustment, which gives the user some control over this.
Verifying Authenticity Before You Use Any Disposable
This section applies to all three devices, and it is not generic advice. Clone disposables in Bangladesh and across South Asia are a documented problem. A counterfeit unit does not just underperform. It may contain e-liquid prepared under uncontrolled manufacturing conditions. That is a meaningful additional concern beyond wasted money.
For the Elf Bar Pi9000: The official verification method is the security code on the packaging. Go to elfbar.com/verify.html, enter the code before opening the device. Authentic first scan returns a verified result. Any other result means the unit is either already opened or fake. Physical check: the Pi9000 packaging should have crisp, sharp printing with consistent colour. The LED indicators should light up as documented in official photography. The e-liquid should taste consistent with the labelled flavour from the first draw.
For the Upends CD30000: The 3D curved screen is the most obvious authentication feature. A clone that cannot replicate the curvature will have a flat screen or a cheap flat LED panel rather than the curved display. Check the Upends website at upends.com for any published authentication code system. Packaging should list the puff count at the specific mode (30K Soft / 25K Norm / 20K Boost). Any packaging that lists a single flat puff count without mode differentiation should be treated with caution.
For the That.That 18K: No official brand verification page was found during our research. The box should list the NexMesh coil type and the three vaping modes explicitly. The digital display should activate immediately on first draw. If the display does not function on first use, the unit is either defective or a clone. Check that the device body matches the Daraz.com.bd listing photography before paying.
If you are buying from us in-store at Shop #22, Level #3, Sahabuddin Plaza, Adabar, Mohammadpur, you can ask us to verify the authentication code with you before you walk out. We stock authentic units and we welcome the check.
Legal Status in Bangladesh: What You Need to Know
As of 10 April 2026, the provisions banning e-cigarettes were removed from the Smoking and Tobacco Products Usage (Control) (Amendment) Act, 2026, which was gazetted on that date. Reporting by Prothom Alo confirms that the e-cigarette ban introduced in the December 2025 ordinance was removed following a parliamentary committee review. E-cigarettes, vaping devices, and e-liquids are not banned under current Bangladeshi law as of this writing.
This is a live legal area. The 2026 Act carries a broad advertising prohibition across print, electronic, digital and social media and at point of sale. Whether that prohibition applies to e-cigarette retail content is unsettled and has not been reviewed by our legal team. We publish this article in educational and informational register for that reason. We are not making any claim that vaping is safe, legal to advertise, or endorsed by any regulatory authority.
Ordering and Delivery
Orders dispatch from KandyVape daily at 3:00 PM, including weekends. Free shipping applies on orders of 3,500 BDT and above. Delivery charges below that threshold, and specific delivery windows inside and outside Dhaka, are listed on the shipping and delivery page.
If you are within range of the Mohammadpur shop (Shop #22, Level #3, Sahabuddin Plaza, Adabar, Mohammadpur 1207, Dhaka), an in-person visit lets you inspect the device, verify the authentication code, and handle the unit before you commit.
KandyVape operates a strict no-refund policy on all products. There are no exceptions for preference or change of mind. We have written this comparison in as much detail as we have because a wrong decision is a complete loss. If you have a question about whether a specific device suits your use case, contact us before ordering, not after.
FAQ
Q: How long will the Upends CD30000 actually last with daily use?
That depends on which mode you use and how many puffs you draw per day. In Soft mode, Upends rates the device to approximately 30,000 puffs. At 200 puffs per day that is around 150 days in theory. In Boost mode the rating drops to approximately 20,000 puffs, or around 100 days at the same usage rate. Draw duration, temperature, and battery charge level all affect real-world results, so treat these as approximate ranges rather than fixed dates.
Q: The Pi9000 has 9,000 puffs but the other two have 18,000 and 30,000. Is it a lesser device?
Not necessarily. The Pi9000 is the simplest device of the three: fixed output, single mesh coil, no mode to manage. If you want a device that requires no decisions and delivers a consistent draw from start to finish, the Pi9000 is appropriate for that. The higher puff count devices require you to understand mode selection to get the maximum value from them. A Pi9000 used daily by a moderate vaper will perform as expected. A 30,000-puff device used exclusively in Boost mode by a heavy vaper may not last much longer than a Pi9000 in practice.
Q: Are all three devices rechargeable?
Yes. All three charge via USB-C. The cable is not included. A standard USB-C cable at any voltage will charge the device, but charging speed will vary depending on the cable and charger output. None of the three are meant to be discarded when the battery runs out mid-use. Recharge them and continue using until the e-liquid is exhausted.
Q: How do I know if I received a genuine Elf Bar Pi9000?
Before opening the device, locate the security code on the packaging and enter it at elfbar.com/verify.html. An authentic first scan will return a verified genuine result. If it fails or reports a previous scan, stop and contact us. Physical inspection: sharp, consistent printing on the box; LED indicators that light up the correct colour sequence on first draw; e-liquid that tastes as described from puff one.
Q: What happens if the device doesn’t suit me after I open it?
KandyVape’s policy is no returns and no refunds on any product. There are no exceptions for personal preference, flavour, nicotine strength, or draw style. This is why we wrote this article in the level of detail we did. If you are unsure about any specification, contact us before you order. If you are in Dhaka, come to the Mohammadpur shop and inspect the device in person before purchasing. We would rather lose a sale than have you paying for something you cannot use and cannot return.
Q: Which device should I order if I want to try before the 3:00 PM dispatch cutoff for same-day shipping?
Orders confirmed and paid before 3:00 PM are dispatched on the same day, seven days a week. Visit the product page for current availability and pricing, confirm your preferred device against the specs in this article, and complete the order through the website or your preferred order channel before the cutoff. If you need guidance on which device to choose, contact us via the listed channels and we will confirm availability and answer any spec question directly.
Q: Does the That.That 18K publish exact puff counts for each vaping mode?
Not in any documentation we were able to verify. The 18,000 puff figure is the headline manufacturer claim and appears to be the maximum under optimal conditions, likely in Eco mode. We could not find a published breakdown for Normal or Turbo mode. If you choose this device, treat 18,000 as the ceiling in the most conservative setting and expect fewer puffs in Normal or Turbo mode. We will update this article if the brand publishes a mode-specific breakdown.
Before You Order
If you have a specific question about which device matches your daily usage pattern, we can answer it. The Mohammadpur shop is at Shop #22, Level #3, Sahabuddin Plaza, Adabar, Mohammadpur 1207, Dhaka. Online orders go through the website at kandyvape.com. Confirm the device you want against the specs in the table above, check the current product page price, and contact us if anything is unclear. We dispatch at 3:00 PM daily. Get your order in before that cutoff for same-day dispatch.
