What can I do with small tin buckets (4" tall)?

Planters? I made tiny planters out of little tea tins!

This is a great way to use them as holiday decor- https://www.hometalk.com/diy/decorate/christmas/galvanized-metal-pails-turned-outdoor-winter-planters-makeover-40362779

Galvanized Metal Pails Turned Outdoor Winter Planters Makeover

Now that the Holidays are here they would look great spray paint them festive colors ( gold, red...) and add tiny fake tree from your local store. Add to your entry way or outside next to the door. Hang a wreath to match the colors you used and some green garland around your door. Make them your own special creations.

Thanks, they're actually smaller though. I guess about 4" tall but 3" wide.

I see holders for anything. If the sides are less angled as shown we had some on the wall with command strips holding markers, pens etc for a craft station. They are great for holding craft supplies or bathroom items including make up brushes.

I like that idea! Thanks.