These reusable silicone food bags are kitchen must haves! Stasher can take heat, cold, liquids, and anything else your kitchen dishes out. The patented airtight seal enables food's nutrients and flavours to be locked in. Stasher was born to sous vide, is microwavable, can be oven baked, and frozen in the freezer! You are never going to reach for another Ziploc bag.