for binge, isn't it 5 drink units in 2 hours? http://www.cdc.gov/alcohol/fact-sheets/binge-drinking.htm A 16 oz pint of 7% IPA is about 1.8 drink units. So, 3 pints of IPA at the pub in 2 hours is over the limit. A 12 oz bottle of 7% IPA is about 1.3 drink units. So, around 4 bottles of IPA in 2 hours is over.