更加卫生的水杯盖子 / A new cleaner bowl cover

Many people like drink water via a cup which has a bottle,
in that way,people can pour water in the bottle to drink hot
water.
However, it is full of bacteria outside. All the surface of
the bottle is very dirty,when people`s lips touch there.
So I designed this new clear bottle cap, which has a jut
area on the top of bottle, which is inside when close it.
In this way,we can drink clear water to protect us from
illness.