Using a silicone bong is just like using a glass bong. Silicone is flexible, but it keeps its shape during use. Some silicone bongs also have a silicone downstem, while others have glass down stems. All of the bongs we sell have pyrex glass bowls that are removable and easy to clean. Most of the silicone water pipes we sell have a slide bowl that will act as a carburetor to help you clear the chamber while smoking.