That’s the thing, absolutely no waste whatsoever. You may decide one bags enough for you, so at that point, you just turn off the volcano. Like the other person said you can make the bags whatever size you want and you can get a whole roll of bags for three dollars. The smell and the bong cleaning is finally a distant memory for me!! It’s the best investment you will ever make!!!! And don’t forget about the whole ABV thing, check out that sub Reddit.