I am so excited about this one! I've been searching for a cassette tape holder at the goodwill store, but I've yet to find anything. I stopped by the Container Store when I went to St. Louis last, and found this! It is made for stationary storage, but I thought it was perfect for ink pads. I put rubber bands around them to keep them extra tightly closed, but also so that they don't slide around when pushing the trays in or out.