I've used the 5 gallon paint strainer bags and they do work. I have also now used the voile type material and had my mother, SWMBO doesn't sew, sew me a bag that would fit the basket on my 15 gal Bayou Classic pot. I actually like the voile better and my effeciency went up. I think that might have been the fact that the voile actually fit and had a flat bottom, where the paint bags kind of hung in the basket and caused the grain to "funnel" to the bottom of the bag and trapping the grain there. The voile allows the grain to move around more.