Rev-A-Shelf makes a Tip Out Tray (pictured above) for the drawers underneath your kitchen/bathroom sinks. This is a great place to store sponges/brushes, but I didn't want to pay $30 for plastic and some hinges. Especially since you can buy the hinges separately for much cheaper.
The size of these trays are:
Instructions:
The author marked this model as their own original creation.