1. Take some aluminium drinks cans (not steel). Energy drinks are good sources.
2. Use a stanley knife to cut the top open (around the ring pull)
3. De-burr with a half round file
4. Pop rivet or bolt them to aluminium angle, or a piece of flat that's slightly longer than the can itself.
5. Pop rivet or bolt the aluminium angle/flat to something in your garage! Or to wall plugs!
Mine's mounted just over my workbench, so they are always easily accessible
Total cost - pennies!