The Hydro Flask 18 oz. Food Flask is perfect for keeping food cold or hot while on the go. Constructed from stainless steel, this food flask won't retain or transfer flavors. With a secure lid, you'll easily be able to take this food flask on the go. No matter if you want your food cold or hot, the TempShieldTM insulation retains food's temperature for hours. The Hydro Flask 18 oz. Food Flask is perfect for packing lunches, trail adventures, or road trips!