8 oz glass of water是啥意思?

问题描述:

8 oz glass of water是啥意思?
买了健身用品,是食用的,国外带回来的背后的解释都能看懂,就有这一小句,有两处都把我搞晕了.原文是这样的:
A half hour before EVERY meal:Drink an 8 oz glass of water with the Power-pop to activate the ingredients,then drink 8 oz glass of water after the Power-pop to flush.
只要解释下8 oz glass of water是什么意思就行了.应该不是8杯水的意思,不然我不是要喝16杯水了?

oz是盎司的意思.