How much Hard Seltzer does the Mangrove Jack’s Recipe Kit make? Tori November 06, 2020 12:53 Updated Approximately 19 L (5 US Gal) or 25 x 750ml bottles Related articles What is the ABV of Mangrove Jack’s Hard Seltzer? Instructions - Hard Seltzer Kit How do I make my own Hard Seltzer? How should Mangrove Jack’s Hard Seltzer be drank/served? What is Hard Seltzer?