Some very good ideas in this video for using Ammo cans. They are pretty cheap for the quality of the product, you can pick up new ammo cans for about $10-15 for the .50 cal cans and about $12-8 for the smaller .30 cal cans and you can get the used military surplus ones for even cheaper.
A couple good uses I like to do with ammo cans is using one as a winter survival kit. They're made metal which is super sturdy for putting in the back of the car or truck and you don't have to worry about breaking anything in them. Another good idea for them is making a first aid kit out of one and you can throw it in the car when you go camping or take it out on the boat because all the cans have a rubber seal that makes them very water proof.
Enjoy the video.
