The Runbott Lunch Thermos Lunch Box is the ideal solution to keep your meals hot or cold while you're away from home. Made of stainless steel with a double wall and a BPA-free inner bowl , it allows you to transport solid and liquid foods without worrying about temperature changes. The double wall with a vacuum chamber acts as a thermal insulator, which helps to maintain the temperature of the food for longer. So you no longer have to worry about your hot or cold food at work, school or on the road.