With the Princess Vacuum bags, your food stays fresh 5 times longer, because they are sealed airtight. Moist products do not dry out and dry food stays fresh. This way, taste and structure remain optimally preserved. So you can store large quantities of fresh products and store them in portions airtight. You use the Princess Vacuum Bags in combination with the Princess Vacuum Machine to create a food supply that stays fresh for months.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.