cleaning your baby's bottles in the dishwasher, you may find there are some leftover residues or smells in the bottle. Depend on the Acorn Baby 9.5-Inch Baby Bottle Scrubber Brush to deep clean your baby's bottles so they can be fresh and like-new for the next use. Constructed of durable silicone, this baby bottle bristle brush will remove residue without damaging the bottle. The 5.5-inch neck and 1.5-inch long bristle end ensure the bottle scrub brush can reach all surfaces within the bottle. Use this infant bottle brush when cleaning water bottles, vases, and more (not intended for wine or beer bottles). Package includes 1 bendable bottle washer brush. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.