We call these "ingenious inventions" because we often make devices to replace or hide caches by using things we find in our messy geo-mobile. These caches could be created by things from bent-out paper clips to duct tape or electrical tape or plumbing tape or string or old, rusty S-hooks or anything else we could possibly find. Whatever we make them out of, they are as "ingenious" as we can make them. As for what this one's made of, that's a surprise for you!
Container has duct tape all over it (not anymore since webdogbert replaced it, thank you for replacing!).