Our bird feeders are made from Malamac/Malamine dishes popular in the 50's and 60's. We advertise them as squirrel proof due to the fact that the squirrels won't eat them. Malamine plastic is harder than the plastic we have today. Also depending where and how they are hung, they are harder for squirrels to get into. We use plates, bowls, and sauces as well as cups, gravy boats, sugar bowls, creamers and serving bowls. This is a great project to up-cycle these dishes and keep them out of the landfills.