I have buttons in the large popcorn container.
Yogurt containers with lids are used next to the stove to put grease in (no grease down the drain) when full toss into trash.
Pill bottles have small beads sorted by color if they didn't have a container when purchased.
Classico jars I use for my homemade apple butter and jams and jellies. They take the rings and lids that are used for canning. Some of the Bertolli jars, too. If you can, check it out. My kids save them for me.
The containers that have fried or roasted chicken from the grocery deli I saved. Annoyed DH until he needed to pack his Christmas cookies for the kids. (He likes to cook and bake. Our adult kids love his cookies.) Some have handles which are great for carrying hand sewing projects in. Also good for putting together all the items needed for small quilting projects.