Review · 3-week test
Adjust MyCool 40K — three weeks in.
The MyCool 40K is Adjust Vape's flagship — 40,000 puffs, 28 mL pod, USB-C charging, and the headline feature: an actual coolness slider on the side of the device. I've used one daily for three weeks. Here's where it earns the price, and where it doesn't.
The coolness slider — is it gimmick or feature?
Most disposable 'adjustable' marketing in the vape space is fake — a printed label on a product that doesn't actually adjust anything. The MyCool slider is mechanical. There's a physical detent ridge on the side of the device; you can feel it click between five positions. Each click changes the ratio of menthol to flavor delivered to the coil.
After three weeks, my honest take: it's a feature, not a gimmick. The difference between Level 1 and Level 5 is dramatic — same flavor cartridge, vastly different experience. Blue Razz Ice on Level 1 reads as soft blue-raspberry candy with barely any chill; on Level 5 it's a menthol-forward shaved-ice profile with the raspberry as a back note. I caught myself adjusting it based on weather and time of day.
The argument against: most disposable vapers don't actually want to think about their device. They pick a flavor and go. For that user, the slider is irrelevant — they'll set it to Level 3 on day one and never touch it again. For vapers who like fiddling with settings, it's a small daily pleasure.
Build quality
The chassis is plastic — same general construction as every 40K-class disposable in the market. Weight is reasonable; the device feels solid in the hand without being heavy. The mouthpiece is integrated rather than a separate cap, which prevents the "lost mouthpiece in a pocket" problem that some brands have.
The slider mechanism is the part I was most worried about — if the detents wore down after a week of fiddling, the whole feature would degrade. After three weeks of daily slider adjustment (probably 30-50 movements per day), it still clicks crisply. The mechanism appears built to last the device's full 40K-puff lifespan.
USB-C port is recessed slightly, which keeps lint out better than a flush port. Battery indicator LED is bright enough to read in daylight, which not every disposable gets right.
Flavor library — 15 options, ranked
I've tried 8 of the 15 MyCool flavors over three weeks. Best-to-worst by personal preference (this is subjective, your mileage will vary):
- Sour Lush Gummy — the candy reference is faithful, the slider lets you balance sour and chill.
- Watermelon Ice — actual watermelon, not bubblegum. Slider at Level 3 is my go-to.
- Mango Magic — best on Level 1, the citrus brightener really works.
- Blue Razz Ice — fine but generic; this is the safe-bet flavor.
- Miami Mint — the cucumber undertone is real; great palate cleanser.
- Tigers Blood — too sweet for me as a daily, but undeniably faithful to the snow-cone reference.
- Sour Apple Ice — solid sour profile but more aggressive than I usually want.
- Dragon Strawnana — three distinct fruits braided well; not my preference but well-executed.
Haven't tried Baja Splash, Cherry Fuse, Cherry Strazz, Peach+, Scary Berry, Sour Strawberry Dragonfruit, or Summer Splash yet.
What I'd change
- Add a slider-position memory. When you go back to a device you left at Level 4, you have to remember what level you set it to. A small notch or label per detent would help.
- Better differentiation between Levels 2 and 3. The difference between 2 and 3 is more subtle than between 3 and 4. Tighter spacing on the chill curve would make the slider feel more deliberate.
- One more "warm" flavor. 13 of 15 flavors have a chill profile of some kind. Peach+ and Mango Magic are the only two designed for low-coolness use. More like that would be welcome.
Worth $21.99?
At Adjust's direct-store price of $21.99, comparing per-puff cost against alternatives: cheaper than any 5K-puff disposable in the market, cheaper per puff than other 20K-class options and 25K-class disposables. Only flagship 40K-class disposables play in the same range, and most of those don't have the slider feature.
The two ways to think about it: if you'd buy a 40K disposable anyway, MyCool's slider is genuinely useful and the flavor library is strong. If you're choosing between a 40K and a refillable pod system, the per-puff cost favors 40K and the simplicity favors disposable — MyCool is a reasonable pick within that bracket.
If you don't already vape and you're considering whether to start: don't. Nicotine is addictive and there are better hobbies. This review is written for vapers who are already in the market.
If MyCool sounds right, shop it direct.
Adult-only · 21+ verification on every order · WARNING: this product contains nicotine.
If the MyCool earns a spot in your rotation, pick a profile from the flavor collection, order it on the Adjust Vape store, or find one nearby through our near-me page.