Our TeaPacs are made using a food-grade nylon pyramid-shape bag which has a high heat-resistance. Rest assured the thread that we use for our Teapacs are 100% pure organic cotton and the pouches are made of food-grade Nylon. We try to use the best quality and we do not use any harmful materials like staples, glues etc. Once filled with a single serving of our freshest tea, the bag is encased in a high-quality laminated pouch. The pouch is then flushed with natural Nitrogen to lock in the freshness of the tea and sealed.