[header] How to ferment cider using wild yeasts [title] Buy some apple juice, either fresh or frozen. [step] If frozen, let it thaw. [title] Pour the fresh or concentrated juice into quart canning jars, any size jars, or any large glasses. 
[step] If it's concentrated, use about 4 ounces of concentrate per quart (one 12-ounce can for 3 quarts), and fill the rest of the jar with water. Leave about an inch at the top for the bubbles, otherwise you could have a mess on your cupboard.