Costco sold chocolate lava cakes that came in these little ceramic cups. (The cakes were great! I hope they bring them back soon.) I didn't want to throw the cups away - after all, we ate about 40 of the lava cakes over the 2 months they were sold - so I've been painting them and leaving them in places on my bike route. We have a mask mandate here in Austin so my bird is obeying.