Just remember: A serving of coffee contains about 100 mg of caffeine. Consuming more than 500 or 600 mg a day can make you nervous, irritable, twitchy and nauseated, among other things . Here’s ...

The Hard Coffee comes with 5% ABV for an 11 oz. can -- about as much total alcohol in there as a 12 oz. bottle of Blue Moon. I feel that little bit of jumpy sensation from the caffeine.