The Magnificent Joyetech Cubis Tank

My Favorite Twenty Dollar Cloud Maker

Julia Hartley-Barnes

The sub-ohm tank segment of the vape industry continues to grow unabated. On one end there are monster size tanks like the Youde Goliath 2, holding 5mL of eliquid and uses coil heads that are so large you could plug up a good sized bullet wound in a pinch. On the other end you have something like the Aspire Triton Mini, or even a Joyetech Mega tank, both with coil heads that look minuscule compared to the Goliath. The new Joyetech Cubis fits right in the middle, size wise and price wise, but when it comes to performance there are very few that can even compete.

Performance with modern sub-ohm tanks (modern = the last 6 months) varies widely, but all do good jobs with flavor and vapor production for the most part. In fact, these past few months, prior to the Cubis, aesthetics, size, weight and price were the important selling points, not the actual performance, because for most of us, performance between most sub-ohm tanks were so close it didn’t matter.

Introducing Cuboid and Cubis

Joyetech Cuboid Mod and Cubis Tank Review by Spinfuel eMagazineJohn’s review here and Smokenjoey’s video review here, do excellent jobs stating my own position on this marvelous and innovative new mod and tank, so there isn’t any need to re-review them here. The only thing I can add to John’s review is that while I was super impressed with the Cuboid’s look and feel, the Cubis tank underwhelmed me upon first impression, and then blew me away.

Aesthetically speaking, the Joyetech Cubis looks timid, underwhelming, but also elegant. It has nice, clean lines that are precisely fashioned, from the mouthpiece down.

The Cubis Tank has oversized windows that show the remaining e-liquid at an easy glance. These glass windows are indented somewhat, protecting the glass with jutting stainless steel struts surrounding the glass tank.

The Joyetech Cubis tank is available in black and stainless finishes, much like the previous flagship tank from Joyetech, the Delta 2, or even the Mega tank for the eGo ONE and eVic-Mini’s.

A couple of things I did find slightly disappointing, but did not affect performance is; the plastic drip tip not fitting tight enough, and the MAX FILL line that is easily seen on the Stainless tank is virtually invisible on the Black version of the tank. I prefer the black color with the clear plastic drip tip, but hitting the refill line perfectly sometimes gets annoying. Joyetech should have retooled the Black tank to allow for a white, or silver Max Fill line to be easily seen.

The steel in the Joyetech Cubis Tank is high-grade 304 stainless steel. 304 Stainless Steel is a super blend of stainless steel, nickel, and chromium, and was originally develop for long lasting kitchen appliances in commercial kitchens.

The chemical structure of 304 SS provides strength, durability, and excellent resistance to rust and corrosion.

The tank portion of the Joyetech Cubis is a high grade glass for strength and clarity.  The Cubis Tank can be completely disassembled for easy cleaning, when you need it.

Airflow Invisibility

The Cubis Tank is made using Joyetech’s new, and ingenious airflow control system. You can adjust the amount of air that is drawn into the tank precisely, with little effort. In an innovative move, Joyetech has ‘relocated’ the Cubis Tank’s airflow valve to the top of the tank, bucking most other tanks bottom airflow system. The move to the top of the tank helps cure a problem that has plagued the sub-ohm tank paradigm forever, leaking from the bottom.

Placing the airflow valve at the top of the tank, and under the outer cap eliminates this leakage problem completely. Not to mention that hiding the airflow slots makes the tank sleeker and sexy, and definitely elegant and clean. To adjust the airflow, you twist the entire top cap. You can remove that top cap to reveal the two airflow slots if you want, but unless its to clean them, there isn’t a good reason.

The Cup

The Joyetech Cubis Tank has plenty of features, but one of the best is Joyetech’s proprietary cup-style e-liquid reservoir.

Joyetech has designed the Cubis so that the eliquid is contained within a “cup”… The cup of course is the glass tank, but because the entire chimney and coil assembly lifts out from the top, the tank itself looks very much like a cup.  Unscrew the top cap and lift it off means lifting out the entire assembly and leaving only the tank, or cup, to fill.

Top Fill?

Going against the established parameters of tank building, I suppose you can call the Joyetech Cubis a Top Fill tank, but in a completely new way. Due to the cup-style tank, you can just pour your e-liquid into the “cup” without having to worry about any hardware getting in the way of glass droppers or thin plastic tips in eliquid bottles because lifting off the top cap means lifting out all the internal hardware. There is nothing to get in the way of quick, clean, fill.

Coil Heads

The Joyetech Cubis Tank is compatible with two new, state-of-the-art atomizer coils. The Joyetech BF SS316 Atomizer Head is a top-grade 316 Stainless Steel coil. Stainless Steel can be used in both variable wattage mode as well as temperature mode, so it is ideal for vapers that want to switch modes on the fly. If you are using the Cuboid mod with the Cubis, and you have updated the firmware to the v3.10 firmware, the BF SS316 Atomizer Coils now work in TCR (Temperature Coefficient of Resistance) Mode as well. With TCR you can set specific parameters based on the coil you use and your personal vaping preferences.

The Joyetech Cubis Tank also works very well with the new BF Clapton Coil (1.5-ohm). This coils uses Kanthal resistance wire, which is then built into a Clapton coil construction. Clapton coils are built by wrapping a larger gauge wire around a smaller gauge wire. This provides for considerably larger surface area to make contact with the e-liquid. It also creates small pockets to hold even more e-liquid, making sure you have consistent coil saturation as often as possible. Clapton coils provide supreme flavor and vapor production, and the coil head for the Cubis is for variable wattage mode only, and mouth-to-lung vaping.

Before I talk about the performance I had with the Joyetech Cubis, here are the formal specs…

  • Dimensions: 2-3/8″ x 7/8″ (Including Drip Tip and Threads)
  • 22mm Diameter
  • 510 Threaded
  • Top Filled Design
  • Innovative Cup Design
  • Hidden Adjustable Airflow Valve
  • 3.5ml e-Liquid Capacity
  • BF Stainless Steel 316 Atomizer Heads for Temperature Control or Variable Wattage Mode
  • BF Clapton Atomizer heads for Variable Wattage Only
  • Insulated Drip Tip

Coil heads are sold in packs of 5 for $9.99.

What’s in the Box?

  • 1 x Joyetech CUBIS Sub-Ohm Tank
  • 2 x Drip Tip (metal and plastic)
  • 1 x BF SS316 0.5-ohm Atomizer Head (lung hit vaping)
  • 1 x BF SS316 1.0-ohm Atomizer Head (mouth to lung)
  • 1 x BF Clapton 1.5-ohm Atomizer Head (mouth to lung)


Take a look at the video below. John sent me this video to demonstrate the enormous potential of the vapor production of the Cubis. I have since tried this with several sub-ohm tanks and none of them could come close to this kind of vapor production. Innovative, ingenious, and impressive, the Cubis performs like nothing I’ve seen before.

When you look at the excellent materials the tank is made with, the innovative ‘cup’ design tank, the and invisible airflow slots at the top of the tank, as well as the incredible low price of just $19.99, and the unrivaled vapor production and flavor output, and compare it to every other sub-ohm tank on the market today, you will not find another tank that offers so much for so little.

While the tank is not perfect, it is the best performer at $19.99, and I would put it up against any other tank, including the UWell Crown, the Goliath, the SMOK TFV4, and even the new Freemax Scylla. (Reviews upcoming) All great tanks, but they just cannot stand up to the innovation and price of the Joyetech Cubis.

Available at Vapor Authority

Grade: A+

Julia Hartley-Barnes