Stashers are great for Sous Vide cooking! Here are some super simple instructions for using your Stasher to Sous Vide: Place your ingredients in the bag, then seal the bag, leaving a 2-inch opening anywhere on the seal. Then slowly submerge your bag in water, the pressure of the water on the outside of the bag will push out any excess air and create a vacuum-like tight seal around your food. Once you have the bag almost fully submerged, pinch the seal completely closed to avoid any air coming in.