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Flum has been one of the best disposable vape brands for quite a while now. As the industry and its user base have matured, though, people have begun to demand more from their disposable vapes. They want devices that they can truly customize and make their own, and that’s led to a new generation of vapes with adjustable flavor.
The Flum UT Bar is the latest vape from Flum and one of the most advanced products in the new generation of adjustable devices. In addition to looking completely unique, it’s the first vape that lets you blend two flavors in whatever proportion you want. The UT Bar is already shaping up to be one of the hottest new vapes of 2026, and it should be at the top of your list if you’re on the hunt for a new experience.
The Flum UT Bar costs $16.95 at the time of writing, and it features a dual-tank system containing 15.5 ml of vape juice and lasting up to 50,000 puffs in all. The exact number of puffs that you get out of the device will depend on how you use it; you can expect the puff count to be reduced if you consistently set both tanks to operate at higher power levels.
The biggest feature of the Flum UT Bar is the dual-flavor design that’s implemented differently from any other vape that we’ve seen to date. Here’s how it works.
People always enjoy having the ability to customize their experience, and the Flum UT Bar takes this idea further than any vape that we’ve seen before. Until now, customizable flavor has always meant one of two things. Either you could switch between two different flavors but not vape both at the same time, or you could customize the level of a sweetness or coolness additive. The UT Bar lets you mix two different flavors in whatever proportion you like, and that adds a lot of fun and variety to the experience.
The UT Bar’s flavor customization does have one potential shortcoming, though, which is the fact that only the secondary tank has an “off” function – the first tank can’t be disabled. This creates a possibility of the first tank running out of vape juice while the second tank still has e-liquid in it. There’s a possibility of getting a burnt flavor at this point even though the UT Bar isn’t completely empty.
Although the dual-tank design is undeniably the UT Bar’s biggest feature, it’s also worth mentioning that this device has a completely unique look and feel. There’s never been another vape that has looked quite like this one.
The UT Bar takes the soft colors and curved edges from the popular Flum Pebble and stretches those ideas even further. The design of the smart display is very creative and interesting, and it’s also functional because it’s very easy to understand the information conveyed. The UT Bar also has a round section on the back that’s slightly squishy, almost like a stress ball.
It's nice to see that Flum is continuing the design themes that they established with their previous device, and it’s also great to see any company doing something different from the usual space-themed designs and light shows that have become common over the past couple of years.
We’ll talk about the full range of UT Bar flavors in a moment, but it’s worth mentioning that the flavor selection is actually one of this device’s biggest features. It’s normal for a new vape to have a fairly small flavor selection out of the gate because the manufacturer wants to keep its production costs as low as possible until enough time has passed to see how the market will respond. Flum clearly knew that the UT Bar would be a hit, so they’ve given this device an impressive flavor selection right from the start.
The UT Bar flavor selection is so huge that it would be difficult to describe every option in a single review. Instead, we'll discuss a few that really stand out.
Not sure which flavor to choose first? We’d suggest grabbing the Green Apple / Fuji Apple flavor if you’re a fruit lover. As we’ve discussed many times on this site, many of the best vape flavors are studies in contrast between sweet and sour. Never before, though, have you been able to customize those two aspects of a flavor profile to your exact taste. This flavor is a perfect introduction to the qualities that make the UT Bar such a groundbreaking vape.
Overall, the Flum UT Bar represents a huge step forward for flavor customization in vaping. We have seen devices with secondary support tanks for additives before. The Juice Head Flex Freeze – which lets you customize the level of coolness in the vapor – is a prominent example of this. Until now, though, we’ve never seen a device that allowed you to mix two completely different flavors in whatever proportion you want. That’s a big deal, and it’s a sure thing that other companies will be copying Flum’s idea very soon.
The UT Bar is a must-try device for just about anyone. Even if the idea of mixing two different flavors in a vape has never occurred to you before, you owe it to yourself to experience it once because no other brand has done anything like this until now.
At the same time, new technologies always have room for improvement. The UT Bar is spectacular as it is, but it would be even better if it had the ability to turn the primary flavor off for more complete usage of both flavors. Adding that feature should be relatively easy, so it’s something that we can hopefully look forward to in a future version of the UT Bar.
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