Bamboo (Made with 40% bamboo). Fits all 8-12 cup cone coffee makers. An earth friendly way to add more flavor to your life. Microfine Flavor Enhancing perforations allow the full coffee flavor to filter through for a rich, flavorful cup of coffee. Compostable. Our double crimped filter design helps protect against bursting. The original pour-over Melitta Bentz - Founder and Inventor. It was 1908 when a German housewife, Melitta Bentz, made coffee history. Tired of the bitterness and troublesome grounds in her daily brew, Melitta poked holes in the bottom of a brass cup and lined it with a sheet of her son's blotting paper. Shen then filled the cup with ground coffee and poured in hot water, thereby creating the pour-over filtration system. The result - rich flavorful coffee without bitterness or mess. This innovation changed the way people worldwide make their coffee, becoming the precursor to modern day drip coffee brewing. Over 100 years later, Melitta remains dedicated to the pursuit of the perfect cup of coffee. It's a naturally renewing resource. Provides same great tasting coffee. Earth Friendly: Sustainable Resource. Recyclable. Global Releaf: americanforests.org. Melitta is proud to be part of the Global ReLeaf program by making an annual donation to support this national education and action campaign aimed at improving the earth's environment one tree at a time.