Description:This drinking bottle is suitable for rodents such as rabbits, ferrets, chinchillas, rats, guinea pigs, hamsters and mice. Instructions for use: Attach the hanger to the cage. Hang the bottle with the nozzle down. It is normal that (after filling) a few drops fall, which will cause a vacuum. Size, contentSmall - 100 ml Medium - 250 ml Large - 500 ml XLarge - 1000 ml