Hydro Flask 18 oz Leak Proof Double Wall Vacuum Insulated Stainless Steel BPA Free Food Flask Thermos Jar, Lava INSULATION INNOVATION: The double-walled, vacuum insulated TempShield Insulation, the same technology used in all Hydro Flask products, will ensure that your meal of choice maintains its temperature for many hours to come. The Food Flask will keep contents hot or cold up to 3 hours. It will even keep your food at temperature if stored inside a box-style cooler with other food or drink items. JUST THE RIGHT SIZE: The newly designed Food Flask is just the right size for snacks and in-between meal temptations. Also great for kids' lunches at school & summer camp or ready-to-go office lunch (Say goodbye to that gross office microwave!) The Food Flask is like a mini-fridge that you can actually carry, small enough to easily throw into a backpack, book bag, or purse. BUILT TOUGH: These Food Flasks are engineered to last, and are made from 18/8 food-grade stainless steel. Now you can finally enjoy your hot soup or chilled fruit on the trail or at work. (Note: The Hydro Flask Food Flask is NOT microwaveable safe) SAVOR THE FLAVORS: Take your time and enjoy the rich flavors and aromas of your favorite gumbo or stew. Keep your food hot or cold for longer so you don't have to feel rushed when eating. Eat at your convenience knowing that your Food Flask will be waiting for you. BE PREPARED: With the excellent insulative qualities of the Food Flask, you will be able to fill your flask with hot soup before heading out the door, and by lunch you can enjoy your still-hot soup or stew. In addition, once you realize how great it is to have a flask that keeps your food hot, you will be less tempted to eat out for meals.