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The material of this design, "Flower Cover", is a kind of special rubber which expands in the liquid. Usually this cover is closed like a bud. When you put it into the water, it will spread far and wide. Several seconds later, it appears as if a flower floating on the surface and keeps your drink warm. What's more, there are narrow apertures on the cover, so tea leaf and slices of lemon can be kept in the cup while drinking. When you drink up, take the flower cover out and dry it in the air. It will become a bud again, which is easy to store and reuse.
Zhan Yangyang Li Hanchao Wang Lei Yang Xiao Gui Lin Li Yan Rao Yu Fu Yueming Chen Chen Fang Yao Chen Si