Adjustable Height of Water Bottle Position To suitable different sizes or height of small animals, the holder has an adjustable height slot to lower or higher the position brings your Dormouse comfy when drinking It comes with a water bottle that has volume as 4 OZ (ca. 120ml) to perfectly match the stand. The base of water bottle holder offers you an opportunity to place your water bottle whereas you wish, especially in a glass tank, aquarium or vivarium. Made from thick bamboo without nails, which is a pet-safe and renewable material, and chewable by your rodents.