The handle is made from sustainable bamboo and this brush has rough, plant-based sisal fibre bristles. This brush is perfect for getting into coffee mugs, wine glasses, jars and bottles. Hang your brush, or store in a jar bristle side down, to keep water from pooling on the handle. Most bottle brushes are made of plastic and are not biodegradable. Replaces plastic bottle brushes Compostable (remove wire under bristles first) Vegan