The Glad Simply Cooking Microwave Steaming bags are made of heat resistant material that is food and microwave safe. Five to Six portions of vegetables can be prepared with each of these bags! These bags are designed for steaming as as such will be HOT upon removal from microwave. It is recommended that tongs be used to remove contents with care. A ONE TIME USE per bag is recommended to avoid cross contamination of food! This item has been discontinued by the manufacturer.