While the entire body of the bubbler is made of silicone, there is an inlaid borosilicate glass bowl for dry herbs. This way, you don't expose the silicone directly to the flame when you are using the bubbler. Just be aware of the flame, making sure it doesn't come in contact with the body of the bubbler. The Silicone Hammer Style Bubbler uses a removable downstem for filtration. You can remove the downstem by simply removing the top of the hammer chamber. On the underside of the hammer chamber, there is also a storage area for dry herbs. Just remove the silicone plug to reveal the contents within. Lastly, there is a metal tool included with the bubbler. The tool is stored on the side of the hammer chamber, and can be used to unclog the bowl.