With my Hollister ostomy bags you are supposed to be able to tuck the bottom of the bag up under the fabric. However, it it doesn't always stay there and would fall back down, especially when you keep having to tuck it back in and the fabric starts to stretch.
Anyway yesterday my fiancee and I were trying to figure out how we could keep it tucked in. She came up with the idea of the round Velcro dots that you see at staples. I thought that they wouldn't stick to the bag but I was wrong. The only thing that you have to make sure is that you put the fuzzy dot up under the fabric instead of the plastic grippy side.
Works nicely and now I don't have to worry about that flap coming untucked now.