The most appropriate way to consume any beverage is from a glass. However, Americans thoroughly enjoy kicking back while sipping on a cold beer from a can or bottle.
Drinking beer from a can or bottle is fine if you’re casually hanging out with friends at a picnic, sporting event or casual bar.
If you’re having a beer while dining at a restaurant or sitting at an upper end bar, pour the beer into a glass and drink from the glass.
When in doubt, add class with a glass.