The Vapir Rise Multi-User Adapter allows up to 4 people to vaporize at the same time. Now you can vaporize with your friends without having to wait around for your turn in line. Just open your valve and begin inhaling. It attaches to the top of the heating chamber and utilizes an independent valve for each user that can be opened or closed with little effort. It's perfect for people who prefer vaporizing in a group or social setting.