In 1892, a Scottish James Duvall, an Oxford University invented a vacuum insulation cup. At that time, he was carrying out a study of gas liquefaction. The gas should be liquefied at low temperatures, and it is necessary to design a container that can isolate the gas and external temperature, so he invites the glass craftsman Berg to customize a double-layer glass container. The inner wall is applied to the inner wall, then the air between the bottle gap is extracted, and the thermal water or ice water in the thermal insulation cup maintains the original temperature due to the characteristics of the vacuum.

At the beginning of the insulation cup, it was called "Du Bao", which was used in the opening of scientific research and physicochemical experiment. Later, the glass craftsman found this bottle to put some hot coffee, hot tea can be enjoyed for a long time, so it is very convenient, so I applied for patents, started Enter the market. In the 1950s, the sales volume of the Insulation Cup reached the most peak, European and American family picnic hiking, the field camping will carry a thermal cup, and this period of insulation cup began to enter the Chinese market.

1. Select according to material

The material in the current market is mainly: stainless steel insulation cup, glass insulation cup, purple sand insulation cup, ceramic insulation cup, plastic warm cup, the best effect is a stainless steel vacuum thermal cup, stainless steel quality can Two-layer cup walls are as thin as much as possible and compress the thickness of the vacuum layer as much as possible, so that the cups have more available capacity, and the effect is better.

2. Observe the height of the base

3. Check the small thickness of the vacuum

4. Listen to the cup echo frequency

5. Watch the temperature change of hot water

1. Insulation cups should not store some drinks

2. Remember to wash in time after use