New York, NY
When ones makes kiddush on Shabbat morning on scotch, is there a need for a revi’it? The minhag is to say it on a shot glass which is less, not sure what that opinion relies on.
100% there is a need for a revi’it. Even if it counts as chamar medinah, you still requires a revi’it. Some will argue that revi’it would be translated into what is the normal size for that liquid, be we have never ever seen such a thing elsewhere regarding a revi’it.
If you don’t want to be drinking that much alcohol, you can make a mixed drink like gin and tonic, rum and coke, orange juice and vodka, etc., since that also is chamar medinah.