Bowls Earth-Centric biodegradable and/or compostable bowls provide a viable, non-toxic, styrene-free, disposable alternative. Made from biodegradable polymers, starches and other nature-based recycled sugar cane and/or the bamboo leaf and other complementary ingredients, our bowls are the "sensibly green" alternative. Our unique blend even allows, in most cases, our bowls to be microwaved safely for reheating.