I just finished bottling 2 1/2 gallons of a pineapple IPA. I brewed a citrusy IPA and on bottling day I split the batch in half. I purchased some frozen pineapple juice concentrate and added 2 cups of H2O to it to reconstitute it. Then added it to the beer to my desired taste. I ended up using about 3/4 of the juice in the 2 1/2 gallons of beer. It's not ready to drink yet but when it is I will give a review. Always fun trying new things. Might be an epic fail but hey, it might be a home run as well. That's why I love to brew. The creativity one can do while brewing is a pure joy. Happy brewing