Your search "film container" resulted in 2 Articles
This tipster shows how a used CR2 battery from an LC-A Instant Back+ or Diana Instant Back+, can be turned into a lightpainting device. All you need is an empty CR2 battery, a LED, a film container and some sticky tape.
As most of us know, photography can be an expensive but a very rewarding endeavor. The economy today tells us that we have to do our part and learn the 3 R's. We all need to Reduce, Reuse and Recycle. Here is a simple DIY project using a film canister.