Product Description For healthy meals in minutes, Ziploc brand Zipâ€n Steam Microwave Cooking Bags combine the taste and nutritional benefits of steam cooking with all the convenience of your microwave. Each bag has patented vents that allow food to be steamed under pressure so that it is cooked thoroughly and evenly for quick, healthy, delicious meals with no mess. Instructions Place food and seasonings in the Ziploc Zip Steam bag and seal firmly. Lay bag in microwave with indicated side up and cook using guidelines on bag. Bag will inflate during cooking and a whistling sound may be heard.Open bag carefully, holding top of bag where indicated. Serve and enjoy.