they keep ash and shit from going into your bong/bubbler/lungs. I use em, they are super cheap and usually i can convince the headshop lady to just throw some in
FlyGuyOU Reviewed by FlyGuyOU on . 2 types of glass screens, which is better? if u see the glass screens on ebay ull see they have a "daisy" design and a ones shaped like jacks. i was wondering if theres any one with experience with these Rating: 5