That's cute but are you concerned about liabilities that might result if what you are doing can be construed as advising people to drink irresponsibly (by giving them helpful instructions for doing it)?
I think people can be trusted to make their own decisions about what they can handle. We've been looking for single serve site ideas for a while and this one came to us when trying to calculate how much wine we needed for our first company birthday party.
It's a good point though, maybe it should have a Please enjoy alcohol responsibly disclaimer. Consider it done.