These are made of silicone, which is the for cleaning cups and baby bottle. They are very and has no harm to the surface of cups. They can be used to cleaning the bottom of cups due to its long handle, convenience and good to use. Silicone does not absorb water and it can be dried quickly. Features - Color: Green . - Material: Silicone. - Size: 24.00X3.50X3.50cm/ 9.43X1.38X1.38inch. - of the rugged bottle always keep their shape, and will not break off or fall apart. - Silicone bottle cleaning brush is designed to reach down into every corner of the bottles to them by . - Our silicone bottle brush cleaner brush unpleasant , stains, - unlike sponge and nylon - preventing nasty stains build-up which is more healthier for your family. - You will no longer worry about the smelly sponge bristles, It may replace all bottle brush in your home. - You can the bottle cleaning brush without more space by the hooks we gave .Very convenient for your use. Package list: 2 x bottle