I am able to store a lot of my craft things in egg cartons. Egg shells, wooden eggs, small wooden balls, small gourds...they fit into the egg cartons and then stack nicely. I cut them apart to put the things in the bottoms and stack them.
I've bought things to put paint on and mix paint on, but I usually use plastic lids, metal lids, and egg carton tops. It is easier to use garbage because it starts out clean and I just throw it away when I'm finished.