I rarely use aluminum foil anymore. When we were kids (many, many years ago) my cousin and I used to fashion designer dresses for her dolls from the aluminum foil covering the cake that my mother broght to dinner. (There was NEVER any cake left and after the pan was washed, the aluminum foil was ours.) Each time we visited her dolls had only their original dresses on them. I don't know what happened to the aluminum foil after our session. Today I use plastic containers or plastic wrap. Plastic containers are washed and reused but plastic wrap sticks together too much for much reuse.