the only point of filters is to keep the bud out of your teeth. so if you dont have a problem with that already, then dont worry about it. otherwise paper works fine, or like ganja said small cardboard works well.

one of the first times i smoked weed my friend showed me how to empty the tobacco out of a cig and make a joint out of it. except he didnt remove the cigarette filter, so most of the thc got stuck in the filter. he meant it as a joke, but i was pissed cause he basically wasted a jays worth of my weed.

nothing to do with your question, but just felt like sharing.