Last Updated on October 30, 2019 by Team Spinfuel

STANDARD - HELLVAPE X HEATHEN FAT RABBIT SUB-OHM TANKWhat does Hellvape have against rabbits, anyway? For years, the Hellvape Dead Rabbit has sat at or near the top of our RDA list for ages. So, when they announced the all-new Fat Rabbit sub-ohm tank, our collective bunny ears perked up. What we weren’t expecting was to get a tank that was more focused on rich, deep flavor than fogging rooms. Maybe that’s not what people were expecting, but color us thrilled that it happened.

Let’s see what’s up.

The Official Description

The Hellvape FAT RABBIT Sub-Ohm Tank is made in collaboration with Vapin Heathen, presenting a myriad of specialized Mesh and Quad OCC Coils, 5mL maximum eJuice capacity, and dynamic top and bottom airflow control! Measuring in at 25mm at the base, the bubble glass diameter of the FAT RABBIT clocks in at 28mm at the widest point. A threaded top fill system resides at the top, unscrewing to reveal two large fill ports.

Underneath the threaded top cap is the first airflow control ring, allowing for airflow to enter and combine with the secondary airflow configuration to create intense flavor and boosts cloud production immensely. Within the FAT RABBIT Tank, the pyrex glass can hold up to 5mL of juice and can be changed out with the 2.0mL bubble replacement glass that is included.

In addition, the FAT RABBIT Sub-Ohm Tank can be used with a 0.15ohm and 0.2ohm single mesh and quad coil option respectively, offering a myriad of ways to enjoy vaping. Furthermore, the FAT RABBIT Tank is a promising sub-ohm vape tank for those that prefer the convenience of replaceable pre-built coils, eliminating the need for tools or build kits.


Hellvape x Heathen FAT RABBIT Sub-Ohm Tank Features:

  • Collaboration with Vapin Heathen
  • 25mm Diameter
  • 28mm Diameter of Widest Point
  • 0mL Juice Capacity
  • 0mL Replacement Glass Capacity
  • Pyrex Glass Reinforcements
  • Superior Stainless Steel Construction
  • Threaded Top Refill System – Two Large Fill Ports
  • Hellvape FAT RABBIT Replacement Coils Series
  • 2ohm Single Mesh Coil (H7-02) – rated for 80W
  • 15ohm Quad OCC Coil (H7-03) – rated for 80W
  • Threaded Coil Connection
  • Wide Juice Wicking Ports
  • Dual Airflow Systems – Top And Deck Based
  • Dual Slotted and Knurled Airflow Control Rings
  • Detachable Structure
  • 810 Widebore Drip Tip
  • Gold-Plated 510 Connection
  • Available in SS or Black

Hellvape x Heathen FAT RABBIT Sub-Ohm Tank Includes:

  • 1 FAT RABBIT Sub-Ohm Tank
  • 1 0.15ohm Quad OCC Coil
  • 1 0.2ohm Single Mesh Coil
  • 1 Hellvape Sticker
  • 1 Accessories Bag
  • 1 Spare Bubble Glass
  • 1 Instruction Manual

When they named the Fat Rabbit, Hellvape (and collaborative partner Vapin Heathen) definitely matched the design. Because this is one seriously squatty tank. Though it’s a very pedestrian 25mm at the base, the extended 5mL glass section brings the overall diameter to 28mm, making for a tank that gets recognized on top of most devices

Initial Impressions and Aesthetics of the Fat Rabbit

Also standing out is the heavily knurled top cap, and top and bottom airflow rings, which adds a little “muscle” to the proceedings. Unfortunately, that also means the Fat Rabbit has a removable top cap for refilling, rather than my preferred slide-to-open style. BUT, unlike most sliding caps, removing this twist cap reveals MUCH bigger fill ports, virtually eliminating pooling and spillage. It’s not always convenient in crowded spaces, but neither is wiping down your mod from wasted e-liquid, so it’s a toss-up.

Another thing worth noting is the narrow chimney section, which leads us to the best feature and quality of the Fat Rabbit tank…

With all the celebrity endorsements and “tough” imagery on the box (and throughout the series, for that matter) the Fat Rabbit is laser-focused on flavor, rather than just cloud production. Sure, the tank can kick out some thick plumes of vapor, but based on the smaller coil head format and narrowish chimney, the Rabbit is really meant for more dignified vaping pursuits.

Vaping the Hellvape Fat Rabbit

Using both of the included coils — a 0.2-ohm single coil and a 0.15-ohm quad coil — produced VERY similar results, with performance nearly indistinguishable from one another. Thankfully, that level of performance is great across the board, so it’s forgivable that they’re not so different.

Both coils excelled with my collection of complex e-liquids, highlighting nuances in my layered juices that most stock coil heads merely hint at. Even my go-to “test” juice sang beautiful notes throughout, offering distinct flavor progression from inhale to exhale, never once fading or muddling the profile.

Even better, both coils offer this level of performance for more than a week of steady-to-heavy use — well ahead of where most coils would be after this amount of testing. The flavor never dissipated until the very end of the coils’ lifespans, and even then, the dropoff was moderate, not precipitous.

The dual airflow rings are nice if you really want to open things up, but on a tank so focused on flavor performance, I was a little surprised they were there, since opening both to full mutes the clarity considerably. I found that leaving the top ring closed with the bottom ring ¾ of the way open produced the best flavor and cloud balance.

My only complaint is that the Fat Rabbit tends to get a little leaky when used at higher wattages. Perhaps I was pushing it a little further than the coils’ stated limits, but seeing liquid pool on the top of my mod wasn’t something I expected, even with two airflow rings.


  • Ridiculously good flavor clarity
  • Long coil life
  • Good capacity with included bubble glass


  • No sliding top-fill cap
  • Coils don’t differ much in flavor or vapor production
  • Two airflow rings seem excessive

Spinfuel VAPE Recommendation and Score

We are genuinely surprised by how strong a flavor performer the Fat Rabbit turned out to be. While Hellvape always makes flavorful products, it seemed like this tank was really designed for cloudy pursuits. But we were wrong in assuming that, because — while the Fat Rabbit can chuck some vapor, this tank was meant to bring out the best from your e-liquids, which it does time and time again.