https://www.polygon.com/fortnite/2018/7/23/17602158/fortnite-slurp-juice-update-patch

Fortnite’s Slurp Juice gives you one point of health and one point for your shield every second after consumption, ending when 50 points have been granted in both areas. But the item is being given a significant overhaul in the next patch.

It all began with a fan on the Fortnite Battle Royale subreddit who posted an idea about how they thought Slurp Juice should work: