Preparing the Coffee Can

First, my Dad cut the coffee can with tin ships. He did this because the tin was very sharp and it was dangerous. He cut it to 3 inches tall. My dad used a pair of pliers to curl the edge of the coffee can down so I wouldn't get cut. Then he cut two holes in the can straight across from each other. They measure 2 inches by 1 inch. He curled those edges too.