Sanko Happy Server by SANKO Water Bottle for Hamsters and Small Animals Made of ceramic, it's heavy and has height, making it difficult to tip over and resistant to chewing! I used it for about two months, but I'm selling it because I switched to a different one. There are no cracks or breaks in the ceramic. The water bottle doesn't leak. The rubber drinking spout has some bite marks, but I'm including two of them.