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When using the common beverage keg to pour certain level, we can’t pour more even if the switch is open. Consequently, users must tilt the keg to pour out all contents. It’s dangerous and laborious. This design changes the internal barrel as a waterslide from wide to narrow. Then, the contents can down the river, and users can easily pour out all.
YI CHEN YU PING CHEN HUEI LING LEE