Actually (here comes the beer geek), cans are better for the beer than bottles. Cans have a tighter seal with less head space, that means much less oxygen than bottles; fresher beer. They also allow zero light so there is zero chance of a light-struck beer, i.e., skunked. The beer never touches metal, all cans since the 80s have been lined with plastic to prevent that contact. They are also lighter and cheaper to ship.