How much is 4 - 6 ounces in water bottles?

4 to 6 ounces of water is equivalent to about half to three-quarters of a standard 16-ounce water bottle. Specifically, 4 ounces is a quarter of a bottle, while 6 ounces is just over a third. You could also think of it as about half of a typical 12-ounce bottle.