Tailless vacuum technology traditional vacuum cup

The traditional thermos cup is made of two layers of glass, the middle of which is vacuumized to isolate heat transfer, so there is an exhaust tail at the bottom of the cup liner, which is easy to be damaged. Thus, the tailless vacuum technology was born. Tailless vacuum technology is to weld the glass mouth with a special process, so there is no sharp exhaust tail, which avoids the damage of the exhaust tail to the cup liner.