You’ve probably drank beer from a pint glass before. In case you’re unfamiliar, it’s a long, tall, straight glass. Many a bar will serve up your beer in a pint glass. That’s what beer is supposed to be served in, right? Well, maybe not. The pint glass is actually a shaker pint, often used in conjunction with a metal shaker to create cocktails. However, the shaker pint isn’t great for beer. Here’s why.

When you pour beer into a shaker pint, the large surface area of the glass makes the head (a.k.a beer foam) disappear quicker. Contrary to what you might think, beer foam is actually a good thing. Moreover, because there’s no stem on a shaker pint, your hands will grip the glass directly and you’ll end up warming up your beer.