Brewer’s Best All Natural Flavorings - Tropical Blast 4 oz Bring a Tropical flavor to your next batch! This natural flavoring will punch up existing tropical fruit notes in your brew or just add the flavor to your batch. This is a four ounce bottle that is sufficient for flavoring 5-6 gallons of beer or wine. It is recommended to begin flavoring with a smaller dosage (1-2 oz.) then wait for 1-2 days, and then adjust to desired flavor level.