Stainless steel lunch boxes typically do not have insulating properties. Stainless steel is a good conductor of heat, which means it is not particularly effective at retaining temperature; heat energy is conducted through the stainless steel walls, causing the temperature of the food to drop.
Read MoreCompared with ordinary cups, sports water cups should be more durable, more convenient to use, and more convenient to carry. The sealing performance and leak-proof performance of sports water cups must also be excellent. Of course, the most important thing is The capacity must be large. These are al......
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