A good insulated cup is not only about the insulation effect

A good insulated cup is not only about the insulation effect, but also about the user experience. For example, ordinary insulated cups generally use tail vacuum technology, which requires a hidden tail chamber at the bottom of the cup. Therefore, although they have a large volume, they cannot actually hold a few sips of hot water. And some high-end insulated cups will use vacuum technology with or without tails, which not only saves space, but also has better insulation effect, and of course, the price is also more expensive.

In addition, the inner liner of the thermos that doesn’t cost much is also more advanced. The old style boiling water bottles used to have glass inner shells, which were easy to explode. So nowadays, insulated cups generally use stainless steel inner liners, which are lighter in weight, stronger in strength, and basically won’t explode. But the stainless steel inner liner of different insulated cups also varies. Using stainless steel with high manganese content and low nickel content to make the inner liner can compress the manufacturer’s production cost, but this type of liner has poor corrosion resistance. If acidic liquids such as ice cola are stored for a long time, it may damage the welding joint and affect the insulation performance. So, ordinary high-quality insulated cup liners are generally made of austenitic stainless steel, with an increase of 16%~26% chromium, which can form a chromium trioxide passivation film on the alloy surface, enhancing the corrosion resistance of the liner. Some of the insulation cups have added molybdenum element for stronger corrosion resistance. In addition, a good insulated cup will also add an inner wall coating, such as mirror coating or PTFE coating, mainly to reduce the friction coefficient of the inner liner.