Earth-Friendly Cleaning Tools Biodegradable Plant "Plastic" Natural & Recycled Bristles Renewable Bamboo Packaged with Recycled Paper and Eco-Friendly Inks Come Clean. Full Circle. Made with Biodegradable Bonterra Plant PlasticNot only does this brush feel good in your hand, but it also looks good on your counter and it"s extra good for the earth.This brush uses a unique bristle blend. Natural plant bristles hold soap for clean, sudsy action, recycled plastic bristles are earth-friendly and super durable. Plant fiber bristles naturally darken after soaking.