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This is a kind of anti-scald straw, whose bottom is inserted with two thermal balls. When the temperature is above 50℃,the objects expand to block the path, preventing the hot drink sucked in straightly. The objects contract when cooled and the drink can be successfully sucked out.
Wu Xi, China
Mr. Hao Huang
Wu XI, China
Hao Wang Jing Lu Jian Gong