Do Mangrove Jack's kits contain dairy or soy? Sam February 18, 2021 13:17 Updated Yes - Bourbon Barrel Strong Ale. Currently, the only beer or cider kit that contains either dairy or soy is the Bourbon Barrel Strong Ale which contains milk allergen and is stated on the packaging. Related articles Video - Quick Overview - Natural Flavours Boost Range Craft Series Beer, Wine, Cider, Mead Yeast strain information Are your beer and cider kits vegan? Is the Hard Seltzer Kit suitable for vegans? Is the Hard Seltzer Kit gluten free?