100% Satisfaction Gurantee:If there exist any questions,negative review can't solve the problem,would you please kindly CONTACT US before leaving a negative feedback or review? We promise that we must will resolve for you. Applicable temperature: -20? to 100? ; Material: subject PP bladder, no magnetic stainless steel inner. Lightweight, it is suitable for any occasion - ideal for using in office, school or outdoor activities Size: 2.1 L, not too big or small, easy to carry. Unique design, preserve the heat of hot food but not for too long and keep the cold food cool, can also be used as one layer or two layers.The top tier features a vacuum seal to prevent spills and keep food fresh, a comfortable handle to better carrying More and more heath washing; Seal structure, not sprinkled, not leak; Two tiers, large enough to hold a hearty serving of hot or cold food for either children or adults, suitable for any occasion - ideal for using in office, school or outdoor activities Note:It can keep your food warm or cold, but not for too long,usually 1-2 HOURS at room temperature. Brand No Brand SKU 100326038_NP-1020602074