朗怡国际有限公司
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描述
联络供应商
描述
- Stoneware mug with normal decal, AB grade.
- Size: dia.: 8cm, height.: 9.5cm.
- This mug, covered with heat sensitive pigment, changes from black to white (or vice versa) depending on whether it is full or not, and how full it is.
- Furthermore, it also shows 'on' or 'off' as you fill it, or gulp the coffee/tea down.
- This, of course, comes in handy in preventing spills as you can tell which mugs on the table are full and which are empty.
- However, since the pigment is activated by heat, do not expect it to work at room temperature.
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