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Resurgence of Genesis Atomizers: Theorem & Avocado 24

Posted on June 23 2016

The vaping industry is constantly changing, with a seemingly endless stream of new innovations hitting the market every few months. As new design concepts become the new trend, old designs become a thing of the past. A prime example was the popular genesis style rebuilable atomizers (RBA), made with a vertical coil, and often silica or stainless steel mesh wicking material. The popularity of genesis tanks eventually waned, as the kayfun style design became the new trend. Many of the new RTAS still draw from the popular design, opting to feature a chamber, with a shorter and wider chimney for improved flavor.

Although genesis style RBAs are now fairly outdated, the core of its design has recently been used as inspiration for the latest hybrid tanks. A few companies have paid homage to the once forgotten design, making major improvements that rival the performance of modern tanks and effectively fueling the comeback of genesis styled RTAs. The new genesis hybrids are an all-in-one concept for customization and convenience. Similar to the original design, the build deck is located directly above the tank to consistently supply e-liquid to the wick. However, unlike the many predecessors, the standard wicking material is now organic cotton. Stainless steel mesh and silica have virtually become obsolete. The original design had its share of flaws, such as leaking, burnt hits and temperamental kinks. However, the idea is golden. Companies like GeekVape and Wismec have taken inspiration from this design to create their latest hybrid tanks, which have been a major hit: the Avocado 24 and Theorem.

wismec theorem avocado 24


The Theorem and Avocado 24 were both designed with a raised build deck for easy access and convenience. The Theorem only has a 2ml e-juice capacity, while the Avocado 24 holds a whopping 5ml of liquid (one of the major improvements from the original Avocado RDTA). The design on both tanks feature both single and dual coil capabilities. With the added space, larger builds have enough room to sit nicely on the deck without touching the sides. The Avocado 24 and Theorem both offer a creative solution for single coil builds by incorporating a ceramic block and a juice plug. The ceramic block functions as an atomizer reduction chamber, which condenses the air density to improve flavor and vapor production.


Build Deck/Airflow

wismec theorem build deckwismec theorem air flow

Overview of the Theorem RTA

If you're fairly new to building or wrapping your own coils, the Theorem is an excellent choice. Wicking on the Theorem is relatively simple and also includes a pre-built NotchCoil. The Notch Coil offers the same benefits as a Clapton coil due to its cylindrical design with notch cut-outs. The stainless steel tube increases surface area to dramatically increase flavor and vapor. In addition, the coil is super thin to eliminate long ramp-up times. Notch Coils with pre-wicked cotton can be purchased separately for users who are new to building or opt out on wrapping.

This top coil tank features two airflow options facilitated by an interchangeable top ring. Users have the option of having air hit the top of the coil, on the side, or simultaneously in dual airflow mode. Airflow is channeled down the ceramic block through a reduced atomizer chamber to feed the side of the coil. With both open, you’ll definitely have a substantial amount of airflow without sacrificing flavor. Having the airflow slots located on the top of the atomizer virtually eliminates any potential leakage points. One of the cons of the airflow ring design is the lack of space or knurling to securely hold it in place when tightening.

Tip: When wicking your cotton, a trick is to cut the cotton shorter so that it doesn't directly touch the bottom of the tank. When you’ve saturated the cotton and poured in the juice, run a pin through the wick slot on both sides of the cotton to release the vacuum effect. Doing this will greatly reduce the chances of getting a dry burn and helps ensure the cotton wicks properly. 


avocado 24 build deckavocado 24 air flow


The Avocado 24 features a a velocity style deck to run single or dual coils with a ton of room to accommodate massive builds. The dual post velocity style deck has been a popular choice among builders due to the spacious platform and large terminal holes. The improved design incorporates a hinged latch to expose an e-juice fill port for filling without having to remove the ceramic block--a major con found on the original Avocado.

Adjusting airflow is a breeze by simply twisting the AFC ring. The cyclops style air slots evenly distribute air to both coils and operate in conjunction. When running single coil mode, a ceramic block is used to channel air to the side of the coil. The top barrel also features additional spacing to generate larger volumes of air.

TipIt is recommended to fill the tank with a dripper or syringe due to the small diameter of the e-juice port. The most efficient wicking is achieved when the cotton is trimmed level to the O-rings.



Hybrid tanks generally require more trial and error to perform to their maximum potential as compared to standard RDAs. Each tank has an optimal wicking method and may take several attempts to eliminate leaking or dry burns. However, the many benefits and conveniences hybrid tanks have to offer are worth the effort.


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