Take one junior high that has excellent water equipment (a central system which, after heating or cooling water, brings it by pipe to taps in every classroom). At mid summer, though there isn't any shortage of students drinking boiled tap water, every month the vending machines and school store sell more than NT $ 300,000 of cold drinks.
以一所飲水設備相當完善的國中為例（中央系統加熱、冷卻後，由管線輸送到各教室，水龍頭一開就有水喝），盛夏時雖然不乏學生大口喝著白開水，但每個月福利社加上販賣機的冰涼飲料銷售業績，仍有卅多萬元。