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. The Proxy base unit is not included. *Please Note: 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.? Proxy Bubbler Features: Puffco Proxy Bubbler Features: Hand Blown Borosilicate Glass Percolated Water Filtration Smoother Cooler Hits What's in the Box: 1x - Puffco Proxy Bubbler