We purchased THESE after we had been feeding "Local community" cats and they were being really handy. I do know They are plastic, but I used to be much more concerned with holding the ants out of the food than I used to be with the fabric in the bowls. http://petshopnearme78765.blogoscience.com/3424453/the-smart-trick-of-pet-shop-jvc-that-no-one-is-discussing