My wife makes it all the time w/out the bread.
One 12oz of malta poured into a clean empty 2 liter
soda bottle. 1/4 sugar. Fill 3" from top with room temp water, and
pitch bread yeast. Cap tight, and store around 70+ temps until the
bottle is extremely tight (carbonation begins)..usually 2 days...move
to fridge to chill.