"What it is: The Proxy Bub adds water function to the Proxy experience. The percolated water filtration provides a smoother and cooler hit. Made from hand blown borosilicate glass. Why We Love It: The Proxy Bub glass coating has been designed with your safety in mind. The coating was tested and complies with industry standards for safety for a medical device Dosing And Potency: Proxy base unit not included A Bit About The Brand: Puffco has brought together the disciplines of design, technology, and engineering with the mission of providing the best platform for user-friendly concentrate consumption. "