1.Since it's Christmas time, I'm thinking a little advent calender. Glue them all in a rectangle and wrap ribbon around the edge. Then you can decorate the tops with numbers and put little gifts inside.
2.Party Lights! Get a strand of colored lights and poke a hole in the tops of some of the caps so you can put the light in. Then get a sharp craft knife type thing and cut out little polka dots or designs in the canister so light will shine through. It depends on how thick the plastic is if you can cut through it though.
3.As little presents you could put 2 little candies or teabags in on with a bow on top and keep a few in your purse for friends you see.
4.One last thing, they'd make great little pill boxes for your purse or little sewing kits you can throw in your purse with a few needles, a couple colors of thread and some buttons.
Do you still have the containers that go in the camera with the film inside? Because i took the tops you have to take of of those with a little can opener and made them into a bracelet with the holes in the middle they look pretty cool.
Soooo that was ALOT. Hope it helps