Big Brush Right Soda Pop, ENG: Brush Twice a Day, Every Day!,Handle: Recycled Soda Pop bottles (PET) and plant- based cellulose (wood). Replacement Heads: Bio-based nylon and 100% landfill biodegradable bristles Bristles: 100% bio-based nylon, 100% recyclable and 100% landfill biodegradable