Introducing Sipp by Thermos. The Sipp Thermos line of products combines sleek style with unique functional features. The Thermal double wall vacuum insulated food jar is made of unbreakable stainless steel and will keep contents hot for 5 hours and cold for 9 hours. The lid is made of Eastman Triton, BPA- free co polyester that resists stains and provides durability. The compact design of the food jar is lightweight for easy portability, and is dishwasher safe.16-Ounce capacity.