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1. Salt Whether it's salt or coarse salt, it can help us get rid of the tea stains on the cups. After the finger is

Sir James Doille, a Scot at Oxford University, invented the vacuum insulation cup in 1893. He put one bottle in the other and then pulled

Extended Insulation Cup original process 1, in the aspect of insulation to extend the Thermos Cup multi-layer vacuum to prevent heat conduction principle 2, the

1: Advantages are light, not easy to break.  2: The disadvantage is that can not withstand too high temperature, high temperature is easy to decompose