Firstly, using an art knife I cut out a rectangular hole (roughly 5 mm x 4 cm) down the central point of the plastic lid that comes with the tin. I made sure the hole was long enough to take a 50 cent coin and wide enough for a $2 coin.
The cutout hole in the lid.
My Photoshop design for the outside wall of the tin.
Thirdly, I crop my print out with an art knife and metal ruler. Then using PVA woodworking glue (I practically use this stuff for almost any art project that requires gluing), I attach the design to the outside wall of the tin cylinder, then allow to dry.
The end result - a very pretty homemade money box.