ounces and pints are part of the English system of measurement, and liters (as well as millilitres, centilitres, decalitres…) are part of the metric system. First, in a bakery, you measure in dry ounces, which you measure in weight. There are 16 dry ounces in a pound, so when it reaches 16 it is recorded as 1 pound. In a bottle of liquid, measure in fluid ounces, which measures by volume. There are 8 ounces in a liquid cup. Second, I think the ounce measurement isn’t even a whole ounce, I think it’s only 0.9 ounces (90% of an ounce) Third, it’s half a liter, and being half a litre, the bottle meant. 5 liters OR 1 liter and 0.9 oz. because 1 liter is two cups of liquid (or 16 fluid ounces) and half a liter is just over 2 cups of liquid. So if you want to use metric, the bottle holds 0.5 (half) liter of water, OR if you want to use English, it holds 1 liter and 0.9 oz (16.9 oz), but you cannot combine the two. I hope I wasn’t too confusing in my explanation, it’s actually quite complicated, and it gets even more so when trying to convert between the two. 🙂