This model is made for holding 3 ping pong balls. You probably need this if you play beer pong so I've embossed a beer pong logo on the canister for you. Make sure you print out the canister cap too. Otherwise your ping pong balls will be everywhere.
EDIT 2013-12-03: Added a version that reads PING PONG, instead of BEER PONG. Both Canister STLs are included. Enjoy
I print with 3 shells using Makerware standard profile.