Puffco Proxy BubThe 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. *Proxy base unit not included *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. Puffco Proxy Bub Features: Material: Borosilicate Glass Compatability: Puffco Proxy Water