EVA reusable sandwich bag with Food Grade Cooling Gel to keep your food fresh. The ChillMate™ Reusable Sandwich Bag goes beyond basic storage, its built-in, cooling gel lining keeps your sandwich, snacks, and perishables fresh and cool until you are ready to eat. No extra ice pack needed. Crafted with a gusseted design for expanded capacity and a smooth zip sliding closure that reseals effortlessly. Bag can be refrigerated or put in the freezer to make extra cold; the gel will not freeze. Hand wash only.