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On the market, there are thousands of kinds of cup sets, but sometimes it is found that beverage cups can not be put in? There are many cup sets can not adjust the size properly, of course, the corresponding cups, may invert the cup unstable and overturn, and the material often in summer, will encounter the drinks of ice melting beads, with dripping wet trousers instead.
Using the Pump ultra-light air bag, the air bag can be manually expanded, and the pressure value reaches a certain value will stop inflating.