Frequently Asked Questions
The cup uses heat sensitive (thermochromic) coating.
When hot liquid (usually above 45–60°C) is poured in, the coating becomes transparent and reveals the printed
2025年12月17日
1 Comment
The cup uses heat sensitive (thermochromic) coating.
When hot liquid (usually above 45–60°C) is poured in, the coating becomes transparent and reveals the printed
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