CHUNMEE 41022 bags are commonly made of filter paper, cotton muslin or "silken" food-grade plastic (such as nylon or PLA/Soilon). They may be sealed with glue, a staple or nothing (meaning that the tea bag is folded shut, sealed with heat or sealed with ultrasound). They often have a bleached or unbleached cotton string and a paper tag indicating the brand or type of tea contained within the...