You'll find that your not actually using a filter, if you ARE then your loosing alot of weed.

I assume you mean a cylinder of rolled up card, maybe sometimes having a n S shape inside it to stop the bud being pulled through into your mouth. That's what we in England and Europe call the roach. Beleive me, it imporves a hit so much its crazy, and you have no wasted weed cos you can smoke it right down to the end.