Versatile Cleaning Solution: Our Bottle Sponge is designed to fit various bottle sizes, from small milk bottles to large glass bottles. It's your go-to cleaning tool. Enhanced Cleaning Power: Shake the Bottle Sponge with two aluminum ceramic balls to improve cleaning efficiency and easily remove dirt. Rich Foam Generation: The fibers of our Bottle Brush Sponge create abundant foam, allowing you to achieve better cleaning results with less detergent. Convenient and Fun: Simply insert the Bottle Brush Cleaner into the bottle, shake, and witness the magic of effortless cleaning. It's an enjoyable experience! Adorable Pea Design: The Cup Sponge Cleaning Brush resembles cute peas, adding of charm to your kitchen while making cleaning more enjoyable.