I had an idea when I saw some rum and bourbon starters (first, I know the rules on distilling and that it's not discussed here). If you were to make a batch of soda, like a ginger beer or cola, then sweetened with lactose, and mix in the appropriate amount of rum ingredients, does anyone know what you would get? I can't find any info on what something like that would be called (maybe still just soda) or if the amount of sugar (9lbs for 6.5gal) would make it too hot tasting.