So, just to check if I’m understanding it right:
- ethanol is measures in ml, 1000 units=1 litre;
- water is measured in portions of 250 ml, 4 portions=1 litre.
If aforementioned is true, then vodka recipe is wrong. It says 125 units (125 ml) of ethanol and 1 unit (250 ml) of water, which will make resulting product have 33% alcohol by volume. Well, the thing is, vodka has 40%.
So, if the recipe is wrong, it should be changed. And as ethanol can be measured in much smaller quantities than water*, it should be changed to 1 unit of water + 167 units of ethanol.
Thoughts, objections, corrections?
*(this system is really confusing, I hope it will be overhauled one day to use uniform measure units, with portions measured in same units)