I understand They are plastic, but I had been a lot more anxious more than preserving ants out of the cats' food than I used to be around the material on the bowls. I still utilize them for h2o for my (indoor) cats. Stick to along with the online video https://cattoys45432.bcbloggers.com/2339985/how-much-you-need-to-expect-you-ll-pay-for-a-good-pet-supplies-shop-near-me