Hi all, Noob here. I've got about a dozen batches under my belt, and have found the search tool has answered most of my questions so far. So thanks for that. But now I'm stumped. I acquired some Coopers carbonation drops that I'd like to use for a cyser that's ready to bottle. The directions say 1 dose for a 375ml bottle. The bottles I'm hoping to use are recycled Guinness extra stout bottles, and they're 12oz. each. That's 354mls. My question is will the 21ml difference make these unsafe? I've never used drops before.
