How to make a difuser for your bong / homemade piece

use a soft pen body and a tack to do this:


and block off the end with hot glue

and then attach it to your bong stem like so :


the black part is a ruber grip from another pen
and you can use paper to really seal it off

 

not if you make enough holes the drag is PERFECT and if you use a screen it wont clog