The Mathematix Glass Illuminati Swirl UV Reactive Glass Hammer Bubbler is a UV reactive water bubbler with UV swirls and dot accents throughout. When placed under a UV light, the swirls and dots glow vibrant green. The UV glass swirls around the downstem into the bubbler base, while the UV dots decorate the neck and head of the pipe. Made of clear cane glass, the pipe is sturdy and heat resistant. You’ll find a standard carb on the bowl of the pipe.