I do know They are plastic, but I had been a lot more anxious around maintaining ants out of the cats' food than I used to be around the material with the bowls. I still make use of them for h2o for my (indoor) cats. I am starting to imagine https://messiahwupkf.wikinewspaper.com/3847846/a_simple_key_for_pets_shop_near_me_unveiled