Ordinary cups are made of metal or ceramics with good thermal conductivity and may be scalded accidentally. The outer design of this coffee cup has a circle of heat dissipation fins, which prevents the transfer of heat and is not so hot in the hand. However, it may bring some inconvenience, such as not being able to warm your hands with a steaming coffee cup or feeling the heat of the coffee cup with your hands, which has both advantages and disadvantages.
Coffee mugs with cooling fins:
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