While out camping last summer, I was using a small sewing kit I had assembled in an empty 35mm film canister. A neighboring camper inquired where I had purchased those little 'Rubbermaid Containers". (Needless to say, she was in her 20's. ) So it got me thinking..................... What DO you use empty 35mm canisters for? And by 'you', I mean YOU. I'm sure there's a million and one possibilities, so let's start listing them here. Notice: Please do not suggest anything that is ingested (food, medication etc) or anything that's medical. Given they are not 'food grade' or sterilized, let's not make someone sick! Besides my sewing kit, I use a white one as a diffuser for my camping flashlight. Makes my flashlight into a great lantern.... without having to carry a lantern! Depending on the setting of the flashlight, I have a bright light to illuminate the entire site, or a gentle night-light for those middle-of-the-night trips to behind the tree. I also carry my Nikon WU-1a and WU-1b wi-fi units in one as well. So what do you use them for?