It is designed to be suitable for all bottle models Thanks to the long-lasting silicone soft bristles on the brush, your bottle is cleaned without scratching It is recommended to clean the bottle after each use in order to prevent bacteria that may be caused by milk residues It easily cleans products that are difficult to clean such as all kinds of feeding bottles, pacifiers, bottles, and jugs It is not absorbent It cannot be used as a toy Use of: Your bottle will be cleaned efficiently when you rotate the long-lasting silicone soft-tipped brush so that it reaches all inner surfaces of the bottle & bottle The teats will be clean when you gently rotate the tiny knurled part on the back of the brush and the residues inside the bottle teats Features: Made of food grade material long lasting silicon bristle brush