Through the virtue of where I work, I am collecting a surplus of 5 gallon buckets and because I'm a pack rat that can't throw things out, the amount keeps growing

I've got about a dozen right now that I haven't used for one thing or another but can't really think what else to use them for. Aside from tool buckets, water carriers, or old oil containers, I'm not sure what to do so I'm looking for ideas! Anything that has to do with the shop or even the garden this spring/summer would be alright by me. So, what do the creative minds at OCC use there excess buckets for?