Besego drawstring tea bags are made of food grade PET non-woven, paper free, unbleached. Get our tea filter bags, you will have a wonderful experience for drinking tea. No debris, no clean up! The 2.4*3.2inch filter bag is designed for a single cup of tea. Simply use a spoon to scoop your tea into the filter bag, and then pull the string to seal. Also great for COFFEE! We promise: We Offer A LIFETIME Warranty on Our Besego tea filter bags. If you are not satisfied with the bags, contact us easily and we'll give you a refund.