>>> This is important because no one ever pours themselves 80 ml of wine.
Well, this is not completely correct - in wine tastings, for example, the recommended pouring usually is about 2 oz which is under 80 ml. Of course, tasting just once is another question that gets us back to the square one...
I never spit out when tasting wine, that seems pointless to me :) Then again, I'm not a professional or even in any manner advanced taster, I just do it for fun.
