PVC plastic is an environmentally friendly, non-toxic and odorless material. The bottle holder is stable and does not shake, which allows you to take it away and change the water easily. The triangular food container is cute and practical for putting or changing food. The bottom vacuum can be placed on the water bottle or the cage. 3 in 1 Hamster feeder, has three hamster functions: drink water from the water bottle, eat the food in the feeder, and rest in the small kennel.