This fun ping pong set holder. Has room for 12 ping pong balls on the bottom layer and can hold 24 in total.

You can use a normal ping pong set or 3d print one here are some models that I used.

The ping pong ball model is from H2Jack Concepts.

https://makerworld.com/en/models/1602395-fuzzy-ball-tpu-super-bouncy#profileId-1689206 (bounces in pla too!)

The ping pong paddle model is from filete3d.

https://makerworld.com/en/models/388528-silent-ping-pong-paddle-airless-style-customizable#profileId-289336