--If the suction cup is deformed and bent, it will not affect to use, and it will slowly recover. You need to rotate the suction cup to remove the small brushes. If the nylon brush head is squeezed or the bristles are deformed when you received, lt can slowly recover to its original state after several times. The bottom suction cup is designed for draining water. This product includes two 10.5-inch long-handled baby bottle brushes,each brush has a 3.7-inch base hidden nylon nipple brush. Baby Bottle Brush Set, 10.5-inch Long Handle, Silicone And Nylon Bristles Bpa Free 360° Deep Clean - Perfect Baby Bottle Brush Cleaning Set, easy to clean every part of bottles, with interchangeable bottle brush head, make them more durable. Chemimoso Multifunctional Cleaning Brush, Baby Bottle Brush, Bottle The nipple brush on the base can be used to clean the silicone nipple effectively and easy to get into the crevices of caps and lids. BPA-free. The long-handled baby bottle brush head is made of food-grade silica gel, the other bottle brush head is made of nylon or sponge, they are all BPA-free, safe and odorless.