While not a particular brand of vape pen in general, and sometimes used with dry herb vaporizers, the glass globe style of wax pens utilizes a glass globe below the mouthpiece which serves a dual purpose of aesthetics & practicality. The enlarged globe serves a functional purpose by cooling down the vapor to allow for much bigger hits, while also showing the user when there is insufficient material within the vape, marking the end of a session for example. With a 510 threading, many glass globe atomizers can be placed on compatible wax vape pens.