Why 40K Puffs Is a Technical Lie: A Lab Director’s Rant

Editorial  |  Spinfuel Lab  |  April 2026

By John Manzione — Founder & Lab Director, Spinfuel eMagazine

In April, I published the Disposable Vapers’ Bill of Rights.  I told you what Spinfuel demands from this industry: honest capacity figures, real battery specifications, full ingredient disclosure, and environmental accountability. I told you the puff count arms race was marketing fiction. I told you brands were lying about their claims of 40K Puffs.

Today I’m going to show you the math.

This is the part of the conversation I enjoy, because numbers don’t have PR departments. Numbers don’t send politely worded emails asking for a “more balanced perspective.” Numbers sit on the page, patient and unforgiving, waiting for someone to do the arithmetic.

I have done the arithmetic. It is not flattering.

If you bought a disposable vape in the last twelve months based on a puff count on the box, there is a near-certain probability that the number has no practical relationship to your real-world experience. Not because the device failed. Not because you vaped wrong. Because that number was never designed to reflect how human beings actually use these products. It was designed to win a shelf war.

Let me explain exactly how that works — with sources, with math, and with the same bluntness I’ve been applying to this industry for fifteen years. Everything in this piece is backed by published research or official documentation. I’ll link you to all of it.

How the Industry Actually Tests Puff Counts

When a manufacturer wants to establish a puff count for their device, they don’t hand it to a group of vapers and say “see how long it lasts.” That would produce an honest number. Instead, they use automated puffing machines governed by testing parameters that bear limited resemblance to how a human being draws from a vape.

Furthermore, understanding the implications of the inflated puff counts, like the misleading 40K Puffs, is crucial for consumers making informed choices.

The general framework comes from
CORESTA — the Cooperation Centre for Scientific Research Relative to Tobacco
, which established machine-testing protocols originally designed for cigarettes and adapted by the vaping industry. The specific standard that governs e-cigarette aerosol testing is
CORESTA Recommended Method No. 81 (CRM 81)
, first published in 2015. It was later adopted internationally as
ISO 20768:2018
.

Here is what a standard machine puff looks like under
CRM 81 conditions
:

Read that carefully. Thirty seconds of rest between every single puff. A machine that takes exactly two puffs per minute, every minute, under controlled temperature and humidity, at the manufacturer’s specified minimum wattage. The
CORESTA standard itself acknowledges
that this regimen “was not based on measured consumer use” — it was agreed upon because it produced repeatable, comparable results across labs. Repeatability for testing purposes is not the same thing as relevance to real-world experience.

The Sub-Ohm Problem: When the Standard Doesn’t Fit the Device

Here is the critical issue that disposable vape marketing never mentions:
CRM 81 was designed for older, lower-powered cigarette-style devices
. Modern mesh-coil disposables operate at 15–40 watts. The CORESTA standard flow rate of approximately 1.1 L/min was built around cigarette-mimicking devices running at a fraction of that wattage.

A
peer-reviewed study published in the International Journal of Environmental Research and Public Health
tested sub-ohm devices at the CORESTA standard flow rate versus higher, more realistic flow rates. The finding:
nicotine yield increased approximately 2.5 times as flow rate was raised to realistic levels.
That is not a marginal difference. That is the difference between a lab result and what a real human actually inhales — and vaporizes — per draw.

In plain terms: the CORESTA machine is pulling air through these high-powered devices at a flow rate designed for a product that operates at one-tenth the wattage. The result is an artificially low aerosol yield per puff, which produces an artificially high puff count. The number on the box is the product of a mismatch between the test standard and the technology being tested.

How You Actually Vape

Let’s talk about real human beings, because that is who is buying these devices.

Puff Duration: Closer Than You’d Think, But Still Off

The CORESTA standard specifies a 3-second puff, which is
closer to real-world behavior than you might expect
. Published topography research puts the
average real-world vaper puff duration at approximately 2.0 to 2.6 seconds
, with experienced users — particularly those on lower-nicotine liquids who compensate with longer draws — regularly reaching 3 to 4+ seconds.

A
Nature Scientific Reports study measuring 60 vapers ad libitum
found mean puff durations of 2.0 to 2.2 seconds across device types, with
experienced vapers on low-nicotine liquids averaging closer to 4 seconds
. The 3-second CORESTA standard sits within that range, which means puff duration alone is not where the argument lives.

The argument lives in flow rate, wattage, inter-puff behavior, and environmental conditions. Those are where the real-world numbers fall off a cliff.

Flow Rate and Wattage: The Numbers That Actually Matter

Modern sub-ohm disposables are designed to be drawn hard and fast. Real users of these devices produce puff flow rates that
researchers have observed reaching 4 to 6 L/min
— three to five times the 1.1 L/min the CORESTA machine uses. Higher flow rates mean more vapor per draw. More vapor per draw means more e-liquid consumed per puff. More e-liquid consumed per puff means a dramatically lower real-world puff count than the machine produced.

The interaction between wattage and flow rate compounds this further. At higher power levels, the coil vaporizes liquid more efficiently per second of draw. The machine tests at the manufacturer’s minimum rated wattage. You are probably vaping at a higher setting, especially if the device has a boost or high-power mode. Every watt above the testing minimum is another variable the puff count did not account for.

The 30-Second Rest Interval

This is the detail that always gets me. The CORESTA machine takes one puff, then waits thirty seconds before taking another. Two puffs per minute, perfectly metered, all day long. When was the last time you vaped like that?

Real vaping patterns studied in
naturalistic settings show inter-puff intervals that vary enormously
— from under 20 seconds for habitual users in cluster-vaping sessions to several minutes between occasional draws. Chain vapers — common among people using disposables as a cigarette replacement — generate continuous coil heat that raises liquid temperature, reduces viscosity, and increases consumption per draw. None of that is in the puff count equation.

Temperature and Environment

The CRM 81 standard specifies controlled ambient temperature and 60% relative humidity. Warm environments reduce e-liquid viscosity, causing faster wicking and higher consumption per puff. A device left in a car on a summer afternoon vapes measurably differently than the same device in a climate-controlled lab. This is a real variable that every field user experiences and that no puff count on a box accounts for.

The E-Liquid Math: When the Numbers Don’t Even Add Up

Now we get to the part I find most useful: the arithmetic. Because whatever testing methodology a brand uses, the e-liquid volume is a fixed physical fact. We can work backward from it.

The Worked Example

Take a disposable vape claiming 40,000 puffs with a 20 mL e-liquid capacity. Using the lab’s own parameters:

Published research measuring e-liquid consumption per puff in real users found that experienced vapers on second-generation devices consumed approximately 5 mg of liquid per puff at moderate use — roughly 5 μL at e-liquid density of 1 g/mL. On modern sub-ohm hardware drawing at higher wattages and flow rates, consumption per puff runs significantly higher.

Ten to twenty times. Not a rounding error. Not an optimistic estimate. The liquid is not there. The claimed puffs are not physically possible under normal human use, and no regulatory body currently requires puff count claims to be accurate, verifiable, or based on any standardized real-world methodology.

Why Nobody Has Stopped This

I want to be precise here, because the easy answer — that brands are simply dishonest — misses something important about how this situation developed.

The vaping industry grew faster than any regulatory framework designed to govern it. In the absence of mandatory testing standards for puff count claims specifically, brands adopted the most favorable testing methodology available. That methodology happened to produce the highest possible numbers. Those numbers looked great on packaging. Once the first brand claimed 10,000 puffs, every competitor had a choice: match the number or appear inferior at point of sale. The race had one direction.

No regulator required them to do otherwise. The FDA’s PMTA process governs safety and marketing authorization but does not mandate standardized, verifiable puff count methodology. The
CORESTA and ISO standards are testing frameworks for aerosol chemistry, not consumer-protection tools for packaging claims. The gap between those two things is where the puff count arms race lives.

The Cigarette Playbook: A Direct Comparison

This is not a new story. The vaping industry is running a playbook the tobacco industry perfected decades ago.

The FTC’s Cambridge Filter Method governed cigarette tar and nicotine testing from 1966 until the FTC formally rescinded its guidance in 2008, forty-two years.
During which machine-measured numbers that did not reflect actual smoker behavior were used as marketing claims. The FTC’s own conclusion when it finally acted was that the test method produced figures that were
“confusing at best, and likely to mislead consumers.”
— the Commission’s exact words in its
2008 Federal Register rescission notice
.

The FTC had acknowledged by the mid-1980s that compensatory smoking behavior made the machine numbers meaningless predictors of actual exposure. They did nothing for another twenty-plus years.

Sound familiar? A machine-based testing methodology produces favorable numbers that don’t reflect human behavior. The industry uses those numbers on packaging. Regulators acknowledge the limitations but don’t act. Consumers make purchase decisions based on a figure that was never designed to represent their experience.

The vaping industry is on the same timeline, twenty years behind. The question is whether it takes another twenty years to correct, or whether the industry self-regulates before a regulator forces the issue.

What an Honest Label Would Actually Look Like

The fix is simple. I proposed it in the Bill of Rights and I’ll repeat it here with the supporting rationale.

Three numbers on the box give a consumer everything they need to make a genuine comparison:

This is not a radical ask. It is the same standard that has always applied to bottled e-liquid. A 60 mL bottle says 60 mL on the label. A disposable containing 20 mL of the same liquid should do exactly the same.

Some brands are moving in this direction. The ones that do will receive explicit recognition in Spinfuel’s reviews. The ones that continue to rely solely on unverified puff counts will be noted, consistently, in every piece we publish.

The Lab’s Standing Policy

Effective immediately and continuing through every review Spinfuel publishes: we will report the actual e-liquid volume in mL alongside every puff count claim. We will note the testing standard mismatch for sub-ohm devices. We will do the math so you don’t have to, and we will link our sources so you can verify everything we write —
including this piece.

We will not remove puff count claims from our coverage. Readers need to know what brands are saying. But we will never present a puff count as a reliable measure of longevity without context, correction, and the mL figure sitting right next to it.

The tobacco industry ran machine-based marketing fiction for forty-two years before a regulator acted. The vaping industry doesn’t have to repeat that timeline. The science is already published. The math is already done.

The only thing left is for someone to say it plainly and keep saying it until the packaging changes.
That’s what the Lab is here for.

— John Manzione, Spinfuel Lab, April 2026