Take one (1) gallon-jug pasturized apple cider, room temperature.
Add 1/2 cup sugar, 1 tablespoon yeast.
Shake.
Replace cap with cork, with 3/8" copper tube through hole in center.
Set glass of water on table next to jug.
Bend tube over, stick free end in glass.
After a couple of days, watch for bubbles in glass.
After three weeks, bubbles will stop.
Run resultant mixture through a coffie filter until clear.
Use with caution.