A Pidgey bank, obviously! Couldn't find any Pidgey pokemon model around, so I grabbed this guy from Pokemon XY and cleaned it up for printing. It's possible (and fairly easy) to print this without any infill, but you will need supports that touch the build plate.

To make this Pidgey bank useful, you'll need to drill/ cut out the holes required, but it's quick work.

Highly recommend using this for coin and not candy. With the recent craze of Pokemon GO, you'll run the risk of your Pidgey evolving if you place more than 11 candies inside :)