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Design description: When we open cans with
carbonated drinks, we do not know whether the pressure
is too high to make the drinks Splashing out . So it is
safe for us to know the internal pressure of the cans .
There is a rubber circle on the top of the Cans to show
theinternal pressure . when the rubber circle is bulging we
know the internal pressure of the cans . so that we will be
able to avoid the drinks splashing out on our body.Of course,
sometimes we want it splashing out when we bingeing
Juncheng Han Wei Xie Pengfei Gao