screens! noob question..

alright.. so i been smokin weed for a while, all types of shit, from pipes to waterfalls, to bongs, to cross joints, to cross blunts:) anyways.. my buddy made a waterfall out of a 2 litre.. he just burned a hole near the bottom, and through the cap, then put a screen on top of the cap and duct taped the shit out of it to keep it in place.. i'm tired of having to go to his house to rip a waterfall so i decided to make my own.. only problem is, i don't know what to use as a screen... anyone know what i can use? i mean, i could use tin foil and just poke holes in it, but it would be shit and i'd really rather not.. hit me up with what i can use.. i'm fiendin' lady m:rastasmoke:..

The obvious answer would be to go to a head shop or tobacco store and buy a pack. However, if you have old style faucets you can unscrew the end and take the screen out of there.