TrailBreak Lunch Jugs have double-walled vacuum insulated construction in stainless steel making them rugged and durable. The powder coating on the outside available in three colors provides a grippy surface. May it be for the kids in the kindergarten, a quick lunch in the office or a hot stew when ski touring a hot meal is better food than just a cold snack, especially in the winter when its important to keep warm. The wide mouth opening makes it easy to fill, to eat from and to clean after use. A benefit with Stainless steel is that it doesnt retain or impart flavors. Not dishwasher or microwave safe. Do not boil the stopper.