Use insulation cup tea will affect the flavor of tea, reduce the nutrition of tea, easy to generate tea scale is not easy to clean. 1. Impact on the flavor of tea: insulation cup temperature is relatively high, if the tea is steeped for a long time at this temperature, the aroma of tea will soon evaporate, reducing the aroma of tea. Tea contains tea polyphenols, tannins and other substances will also be a large number of leaching, so that the color of tea becomes thicker and more bitter. Therefore, it is not suitable to use insulation cup tea. 2. Reduce the nutrition of tea: tea can be refreshing, if the tea is steeped for a long time in a high-temperature state, the nutrients in the tea will be lost, and the vitamins contained in the tea will also be destroyed. 3. easy to generate tea scale is not easy to clean: when the tea leaves in the tea cup steeped for a long time, will accumulate a layer of dirty tea scale. After a period of time, a layer of dirty tea scale will accumulate, not easy to clean, easy to breed bacteria. You can use ceramic pots and glass cups to make tea, and should not use insulation cups. Tea is best consumed after steeping for 4-6 minutes.