漂白水

漂白水 洗杯。
去除留在杯里的水印。
E.g：coffee or tea
但過後要用清水寖至少一天（那個杯）。。。

When overdose of chlorine enters the body as a result of breathing, swallowing, or skin contact, it reacts with water to produce acids. The acids are corrosive and damage cells in the body on contact.
chlorine, when added to water, forms Trihalomethanes (chlorinated byproducts) which is carcinogen(cause cancer)

avoid from chlorine!!