It is a brush made of bamboo handle and sisal fiber. It is a convenient brush that can be used not only for daily dishwashing, but also for cleaning kitchens and bathrooms and polishing floors. Compostable and biodegradable, this bottle brush can be an alternative choice to plastic brushes. You're one step closer to a plastic-free & zero-waste lifestyle. [Advice] Be careful to dry thoroughly after use. If left immersed in water, the bamboo part will swell or crack. Soaking the brush area in vinegar will help kill germs and bacteria.