1.A removable bottle cleaning sponge brush. With a handle, you can easily clean the inside of the bottle. Convenient for washing elongated tubular objects Convenient for cleaning the inside of cups, beer glass, water bottles, baby bottles, etc.2.[Set contents] Bottle brush (with sponge set) x 1, replacement sponge x 3 [Material] Stainless steel + sponge [Size] Brush: Length 23.3 cm(9.17in) Sponge: 8.5 cm (3.3in)x 5.5 cm (2.2in)x 4.5 cm(1.8in)3. The sponge attached to the handle and the replacement sponge may have different grain roughness, but there is no problem with the quality.4.A sponge with good foaming cleans the inside of cups and bottles. It fits in the corners, bottom and sides to remove dirt firmly. Unlike the brush type, there is little unwashed residue and water does not splash.5. A replacement sponge is set. The replacement method is simple, shift the tome metal fittings, replace the sponge, and return the tome metal fittings to complete.