In the FoodSaver Freeze 'n' n Steam Pouches 21x24cm 16 you not only keep products fresh longer, but you also use them as a steam bag. Use the steam bag directly from the freezer and steam the ingredients in a steam oven or microwave. You prepare a healthy meal when you have time, and steam it at a later time. The bags are easy to use. Fill them with your favorite ingredients, seal the bag and keep it in the freezer. These bags are specially developed for the Foodsaver vacuum machines.Cook your vacuumed meal in a special sous vide pan to 100 degrees. Do you use an ordinary pan? Then keep an eye on a kitchen thermometer that the water does not get hotter than 75 degrees Celsius. Otherwise the plastic bag melts against the hot walls of your cooking pan.