The clear-tank disposable vape category has expanded quickly and some of the most premium disposable vapes on the market now feature a transparent shell that allows you to monitor the e-liquid level. 

The Geek Bar CLR 50K, Lost Mary VIZ 55K, UT Clear Tank 50K, Foger Switch Pro, and Off Stamp X-Cube Crystal Cube all let adult vapor consumers see the remaining e-liquid, but they handle power, airflow, battery design, screens, and replaceable hardware very differently.

This comparison looks at all five clear-tank platforms side by side. The UT50K, Lost Mary Viz 55K and Geek Bar CLR are traditional one-time use disposable vapes. The Foger and Off Stamp use modular systems where the battery and electronics are reusable and the disposable vape component with e-liquid, coil and small battery are replaced when empty. 

Why Clear Tank Disposable Vapes Matter

Digital e-liquid indicators became standard on disposable vapes as puff counts increased and recharging entered the picture. A simple red-green light really isn't enough when dealing with a vape that could last weeks or longer depending on habit frequency. But that indicator is an electronic estimates based on power discharged, which is determined by how long the draw-activated device is being used.

A clear tank disposable vape provides something much simpler: a direct line of sight to the actual e-liquid reservoir. It also showcases the sophiscated coil doing the atomization. Nic salt soaked polyfill disposable vapes have great flavor and are extremely efficient. But they are not much to look at. Hence, no transparent shell. 

The clear tank vapes reviewed today efficiently extract tens of thousands of puffs and hold over 15mL of e-liquid. Instead of waiting for an electronic gauge to tell you what it thinks is left, the remaining liquid can be inspected visually.

Geek Bar CLR 50K

The Geek Bar CLR 50K is arguably the most conventional disposable in this comparison. It takes the familiar self-contained Geek Bar format and adds a transparent 17mL reservoir.

The CLR provides up to approximately 50,000 puffs in Regular Mode or 25,000 puffs in Pulse Mode. Its 900mAh rechargeable battery powers a dual mesh atomizer, while Geek Bar's VPU technology manages heating and e-liquid delivery.

Geek Bar promotes VPU Inside as improving heat and fluid transmission and claims a 23.7% increase in cloud volume. That percentage is a manufacturer performance claim.

Geek Bar CLR Strengths

The biggest advantage is simplicity. It delivers Geek Bar vape flavors in an easy to navigate clear tank vape. The display is positively pared down compared to the Pulse 2 or Pulse X2. There is no reusable dock, detachable battery, or separate smart device to keep track of. Recharge the CLR through USB-C, choose Regular or Pulse Mode, and the clear reservoir provides a direct view of the remaining e-liquid.

Its 17mL capacity also slightly exceeds the 16.7mL Lost Mary VIZ while keeping the traditional disposable format intact.

Lost Mary VIZ 55K

The Lost Mary VIZ 55K is the most direct alternative to the Geek Bar CLR. Both use clear tanks, rechargeable batteries, dual mesh coils, and two power settings. But the Lost Mary VIZ 55K is a unique design, with the tank transparent from every angle and the center stack containing the coil and display. 

The VIZ carries 16.7mL of e-liquid and is rated for approximately 55,000 puffs in Regular Mode and 30,000 puffs in Boost Mode. Those are the highest stated puff counts in this comparison which is testimony to the optimized coil design and wattage. 

An 850mAh battery supports 1.3A fast charging, while the 360 Visible LED Display creates a much more dramatic interface around the transparent reservoir.

Lost Mary VIZ Strengths

If maximum stated puff count is the priority, the VIZ takes the lead. It also has one of the more integrated visual designs in the category because the clear tank and 360 display function as one overall presentation.

The tradeoff against the CLR is slight. The VIZ has 0.3mL less e-liquid and a slightly smaller battery, but its published puff ratings are higher.

UT Clear Tank 50K

The UT Clear Tank 50K deserves more attention in this comparison because it takes a different route from both Geek Bar and Lost Mary. It is a derivative of the flavor control UT 50K, which offered flavor control but does not have a clear tank. 

The UT is rated for approximately 50,000 puffs in Eco Mode and 25,000 puffs in Turbo Mode. Those numbers line up almost exactly with the Geek Bar CLR's 50K Regular and 25K Pulse ratings.

The similarities stop there. UT combines its visible e-liquid tank with a full display, adjustable airflow, and dual mesh / dual core coil architecture. Rather than relying primarily on electronic power modes to change the experience, users can also physically adjust the airflow.

UT Clear Tank 50K Strengths

The clearest advantage of the UT is airflow control. Adjusting airflow allows adult vapor consumers to change draw resistance without necessarily changing power mode.

That gives the UT a level of mechanical customization that is not listed for either the Geek Bar CLR or Lost Mary VIZ.

Its Eco and Turbo modes also make the operating logic familiar. Eco emphasizes longevity at approximately 50,000 puffs, while Turbo increases output and reduces the estimated puff rating to around 25,000.

UT Clear Tank 50K Display

The UT uses a full screen with battery and power-mode information. Combined with the transparent tank, users can monitor the electronic status of the device while visually checking the e-liquid itself.

That gives the UT two different ways to monitor remaining resources without relying entirely on an estimated digital e-liquid gauge.

Foger Switch Pro

The Foger Switch Pro is a modular disposable vape. The disposable section contains 19mL of e-liquid, a 200mAh battery, 1.0Ω dual mesh coil, clear tank, and adjustable airflow. For full functionality, it requires to be magnetically attached to the Foger Switch Pro battery charging dock, which contains the electronic smart components and is sold in the kit. The battery half is 850mAh reusable power bank for a combined battery capacity of 1050mAh. Replacement Switch Pro disposables can be purchased separately once the battery is already owned.

The Foger is rated for approximately 30,000 puffs in Normal Mode and 18,000 puffs in Boost Mode.

Foger Switch Pro Strengths

Foger has the largest listed e-liquid reservoir here at 19mL, but its modular battery architecture is the bigger distinction. It is a more cost-effective approach to vaping that produces no waste. The Clear Tank is one of the defining traits and has made it one of the biggest disposable vapes on the market. 

Off Stamp X-Cube Crystal Cube

The Off Stamp X-Cube Crystal Cube takes modular design another step by offering a reusable battery and several variants of pod design. There is a Sweet and Ice Control optiob. There is also a Classic Cube. By far the most popular variant is the Crystal Cube, which offers a clear tank. 

The transparent disposable pod contains approximately 18mL of e-liquid, 50mg nicotine, a dual mesh coil, two-level airflow control, and a small 100mAh internal battery.

It magnetically attaches to a 1000mAh reusable X-Cube Smart Device. That reusable component provides three power levels, USB-C fast charging, a 2.25-inch TFT display, battery and e-liquid monitoring, and display controls.

Off Stamp X-Cube Strengths

The X-Cube is the most advanced reusable platform of the five. Like the Foger, the main battery hardware stays with the user after the disposable section is depleted.

The difference is that Off Stamp also houses the large screen, power controls, and much of the user interface inside the reusable Smart Device. This allows support for Flavor control technology, although on the Crystal Cube has the transparent tank. 

Geek Bar CLR 50K vs. Lost Mary VIZ 55K

The CLR and VIZ are the simplest head-to-head comparison because both remain conventional self-contained disposables.

Lost Mary leads in stated puff count at 55K Regular and 30K Boost versus Geek Bar's 50K Regular and 25K Pulse. Geek Bar carries slightly more e-liquid at 17mL versus 16.7mL and uses a 900mAh battery instead of the VIZ's 850mAh cell.

For many users, the decision will come down to brand preference, available flavors, and whether the VIZ's 360 display or CLR's VPU-based presentation is more appealing.

Geek Bar CLR 50K vs. UT Clear Tank 50K

The Geek Bar CLR and UT Clear Tank have nearly identical headline puff ratings: approximately 50,000 in their efficiency-oriented settings and 25,000 in their higher-output modes.

The distinction is customization. Geek Bar emphasizes its VPU technology and familiar Pulse Mode experience. UT adds adjustable airflow alongside Eco and Turbo modes.

If you want a simple all-in-one Geek Bar with a transparent tank, CLR makes sense. If airflow control is a priority, UT has the more flexible hardware configuration.

Lost Mary VIZ 55K vs. UT Clear Tank 50K

The Lost Mary VIZ wins the stated puff-count contest, while the UT Clear Tank provides more control over the draw.

VIZ is rated for 55K Regular and 30K Boost, compared with UT's 50K Eco and 25K Turbo. UT counters with adjustable airflow and its dual mesh / dual core setup.

This makes the VIZ the more longevity-focused option on paper, while the UT is the more adjustable conventional clear-tank disposable.

Geek Bar CLR 50K vs. Foger Switch Pro

This is a comparison between two very different ownership models.

The Geek Bar CLR is a self-contained rechargeable disposable. Use the 17mL reservoir, recharge the battery when necessary, and replace the entire device when the e-liquid is depleted.

The Foger Switch Pro instead keeps its 850mAh power bank in service and replaces only the 19mL disposable section.

The Geek Bar offers higher stated puff counts, while Foger provides more e-liquid, adjustable airflow, and reusable primary battery hardware.

Geek Bar CLR 50K vs. Off Stamp X-Cube Crystal Cube

Off Stamp follows the same broad modular concept as Foger but places more electronics in the reusable component.

The X-Cube Smart Device houses the 1000mAh battery, 2.25-inch TFT screen, three power modes, and monitoring functions. The Crystal Cube pod contains the consumable e-liquid and dual mesh coil.

The Geek Bar CLR is simpler. The Off Stamp is more adjustable and retains substantially more hardware between replacement pods.

UT Clear Tank 50K vs. Foger Switch Pro

Both the UT Clear Tank 50K and Foger Switch Pro offer adjustable airflow, but the similarities end quickly.

The UT remains a conventional rechargeable disposable with Eco and Turbo modes. Foger instead separates its disposable reservoir from the reusable magnetic power bank.

UT therefore offers airflow customization without committing to modular hardware. Foger is the better fit for users specifically interested in keeping the larger battery component when replacing the disposable.

Which Clear Tank Vape Has the Highest Puff Count?

The Lost Mary VIZ 55K has the highest stated standard-mode rating in this group at approximately 55,000 puffs.

Geek Bar CLR and UT Clear Tank both follow at approximately 50,000 puffs in their Regular and Eco modes.

Puff ratings are manufacturer estimates rather than guarantees. Draw duration, power setting, airflow, and individual use can substantially change actual longevity.

Which Clear Tank Vape Has the Largest E-Liquid Capacity?

Among the products with confirmed capacities here, the Foger Switch Pro leads at 19mL.

Device	E-Liquid Capacity
Foger Switch Pro	19mL
Off Stamp X-Cube Crystal Cube	18mL
Geek Bar CLR 50K	17mL
Lost Mary VIZ 55K	16.7mL
UT Clear Tank 50K	Not Listed

Which Clear Tank Vape Has Adjustable Airflow?

The UT Clear Tank 50K, Foger Switch Pro, and Off Stamp X-Cube Crystal Cube all offer airflow adjustment.

The UT pairs airflow control with Eco and Turbo modes. Foger combines airflow with Normal and Boost settings, while the Off Stamp Crystal Cube provides a two-level airflow system alongside three power settings on the reusable X-Cube Smart Device.

Adjustable airflow is not listed in the supplied specifications for the Geek Bar CLR or Lost Mary VIZ.

Which Clear Tank Vape Has a Reusable Battery?

The Foger Switch Pro and Off Stamp X-Cube are the two true modular systems in this comparison.

Foger uses an 850mAh reusable magnetic power bank. Off Stamp uses a 1000mAh reusable Smart Device with its own TFT display and controls.

Geek Bar CLR, Lost Mary VIZ, and UT Clear Tank use rechargeable battery technology, but their main battery remains part of the disposable device.

Best Clear Tank Disposable Vape by Priority

Priority	Best Fit	Why
Simple All-in-One Design	Geek Bar CLR 50K	Clear tank, VPU, dual mesh, and familiar Regular/Pulse operation.
Highest Stated Puff Count	Lost Mary VIZ 55K	55K Regular and 30K Boost.
Conventional Vape with Airflow Control	UT Clear Tank 50K	50K/25K performance plus adjustable airflow and full screen.
Largest Listed Capacity	Foger Switch Pro	19mL plus reusable magnetic battery hardware.
Most Advanced Modular Platform	Off Stamp X-Cube Crystal Cube	Reusable Smart Device, TFT screen, three power levels, airflow adjustment, and replacement pods.

Clear Tank Disposable Vape FAQ

What is a clear tank disposable vape?

A clear tank disposable vape uses a transparent or partially transparent reservoir that allows the remaining e-liquid to be viewed directly.

Which clear tank disposable has the highest puff count?

The Lost Mary VIZ 55K has the highest stated standard-mode puff rating in this comparison at approximately 55,000 puffs.

Which clear tank vape has adjustable airflow?

The UT Clear Tank 50K, Foger Switch Pro, and Off Stamp X-Cube Crystal Cube offer adjustable airflow. The Off Stamp uses a two-level airflow system.

What is the difference between Geek Bar CLR and UT Clear Tank?

Both are rated for approximately 50,000 puffs in their efficiency-oriented modes and 25,000 in their higher-output modes. The Geek Bar CLR emphasizes VPU technology and a 900mAh battery, while the UT Clear Tank adds adjustable airflow and a full-screen interface.

What is the difference between Lost Mary VIZ and UT Clear Tank?

The Lost Mary VIZ has higher stated puff ratings at 55K Regular and 30K Boost. The UT Clear Tank is rated for 50K Eco and 25K Turbo but adds adjustable airflow.

Which clear tank disposable has the largest capacity?

Among the devices with confirmed capacity figures here, the Foger Switch Pro has the largest reservoir at 19mL.

Which clear tank vapes use reusable primary batteries?

Foger Switch Pro and Off Stamp X-Cube use reusable main battery hardware with separately replaceable disposable sections.

Final Thoughts

The Geek Bar CLR 50K, Lost Mary VIZ 55K, UT Clear Tank 50K, Foger Switch Pro, and Off Stamp X-Cube Crystal Cube demonstrate how quickly the clear-tank disposable category has diversified.

The Geek Bar CLR provides the simplest familiar all-in-one format. Lost Mary VIZ pushes stated puff counts higher and surrounds the transparent reservoir with a 360 display. The UT Clear Tank 50K adds adjustable airflow to a conventional 50K platform, making it a particularly interesting middle ground between simple disposables and more complicated modular systems.

Foger Switch Pro combines the largest listed reservoir here with a reusable magnetic battery dock. Off Stamp X-Cube goes furthest toward reusable hardware with its Smart Device, TFT screen, three power settings, and replaceable Crystal Cube pods.

The best choice therefore depends less on which device has the biggest number printed on the box and more on how much control and reusable hardware you actually want. For a traditional disposable with a clear tank, Geek Bar, Lost Mary, and UT take three different approaches. For customers interested in keeping the primary battery hardware between replacements, Foger and Off Stamp occupy a different category altogether.