This is a test of commonsense. Complete the next sentence:

How to make simple hard cider
The must is the mixture of ingredients you mix prior to the fermentation that will eventually become your cider.
Take your 2 liter (0.5 us gal) soda bottle and fill it with 250 ml of carton apple juice and 1 liter (0.3 us gal) of water.
Mix in your sugar.
Sugar is used to boost the metabolism of the yeast and increase the alcohol content. It is best to use your own judgement as per how much of each to add as long as they're both completely dissolved.