Never again.....Sound familiar? Make sure that you don't overdo it again with the BeerOmeter. It's said the men should consume no more than 3-4 units of alcohol a day, and women no more than 2-3, but how much is a unit? The BeerOmeter features units of alcohol marked off on the side of the glass according to the alcohol percentage so that you know the number of units consumed. The glass keeps tabs on your units; you just need to keep tabs on your re-fills!