An airless PETG ping pong ball built with a basic internal lattice that keeps it from caving in, even when squeezed or smacked hard. It doesn’t rely on air pressure, so it won’t pop or deform like regular balls. The bounce is decent for casual games, and the sturdy plastic makes it last a long time. It’s practical, tough, and great for anyone who wants a ping pong ball that can survive plenty of rough use. Credit to shawn.mek over on Maker World. https://makerworld.com/en/models/232540-airless-ping-pong-ball-table-tennis-ball?from=search#profileId-249397