I needed something simple to hold all the change that I get throughout the day. I jumped into 123D Design and made a 75 mm by 75 mm by 75 mm container. The walls shell thickness is 0.8 mm. It is optimize to print on a MakerBot Replicator 2 with 0% infill and 2 shells. Mine printed in a little under an hour and a half.
Download the STL if you want to slice the file yourself. Otherwise if you have a MakerBot Printer you can download the X3G and print it.