Sell Portable household small insulation box round multi-layer stainless steel lunch box best price

Product name: Insulation box Brand: other Material: Stainless steel Shape: round color: blue Number of floors: three floors Applicable objects: all Product size: 13.2cm wide*20cm high Sealing: high quality silicone sealing ring Whether to keep warm: Yes Style: European and American Product Category: Preservation/Insulation Product quality level: qualified Three-layer capacity: 2100ml Product features: rice cover vent/hidden handle/reinforced sealing ring/buckle design/stainless steel liner/non-slip bottom The heat preservation box is a food container made of double-layer stainless steel plus a vacuum layer or heat insulation layer. It has a lid on the top and is tightly sealed. The vacuum layer or heat insulation layer can delay the heat dissipation of the food inside to achieve the purpose of heat preservation. The insulation box is developed from the thermos, and the principle of insulation is the same as that of the thermos. There are three ways of heat transmission: radiation, convection and transmission. The silver inner tank in the thermal insulation box can reflect heat radiation, and the vacuum layer or heat insulation layer of the thermal insulation box can block heat transfer. Modern thermal insulation lunch boxes use high-tech vacuum technology to vacuumize the double-layer high-quality 304 stainless steel interior, which can effectively block the heat source and achieve the effect of thermal insulation. The design is more user-friendly. The lunch boxes and soup boxes that require higher temperature are placed under the heat preservation box, and then the middle is covered with the heat insulation board, and the vegetable box is placed on it, which can not only bring you the best heat preservation effect, and let your food , Drinks keep warm for longer and fresher. 13.2*20