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The form of this cup comes from conch.
In winter,people prefer to keep warm by a cup of hot water.But the heat of the water can't usually last long.The special structure of the Conch Cup could keep the warm air staying in the middle of the conch hole where you put your hands.By the way,this special way to hold the cup also reduce the probability of dropping the cup.
Hansen Wei, Shaochen Li, Jinrui Xu, Shuo Wang,