Vacuum Insulated Stainless Steel Double Walls lunch box:Tiger executive lunch box set container case is made of vacuum insulated stainless steel double walls. This technology ensures that the temperature is retained for a longer period of time. The stainless steel walls are made of SUS304 (18/8) stainless steel. Keeps Food Fresh and Hot: The stainless steel lunch box set retains heat at a temperature of 69 ℃ for up to 6 hours. It keeps the food fresh and warm till lunch time. Just microwave - if needed, and enjoy your delicious lunch! Container sizes and Dimensions: The lunch box set contains - 1 Rice container of 0.61L, 1 Side dish containers of 0.34L and 1 Soup container of 0.27L. The dimensions with the container carrier are 15.0×14.7×21.4cm and weight is 1.00 kg Leakage and Spillage Proof Containers: Food leaking or spilling out of containers is a major complaint, this problem has been taken care of in Tiger Lunch Boxes. You can carry curries/dal in the airtight containers without any fear of leakage or spillage in the stainless steel container carrier of mixing with the other dishes. Super Clean the Lunch Box with Ease: Tiger vacuum insulated stainless steel double walls lunch box can be cleaned easily. The high quality material used in both the container case and the containers ensure that the odor and stains of the food can be washed away with soap and water. The super clean finish ensures that food remains fresh and does not smell like yesterday meal.