The cup has a double layer of food grade AS material, and the sandwich contains refrigerant (food grade gel particles)
On hot summer days, put the cup in the refrigerator and freeze it for 2-4 hours. When the refrigerant is frozen, take out and pour into the drink. The cup can be used repeatedly, no longer need to worry about the embarrassment of no ice, I believe this is a magical ice cool cup that makes people envy this summer.
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