Step 1

Add the grapefruit juice or fruit and sugar to a 16-ounce vessel.

Step 2

Fill with kombucha, leaving about ½-inch of headspace.

Step 3

Cap tightly and culture 3-7 days or until kombucha is carbonated to your liking.

Step 4

Move bottles to refrigerator for storage.

Step 5

Open carefully when ready to drink, without shaking, to avoid spilling the bubbly kombucha over the top of the bottle.