"Aluminum Bottles" C or D?

Weirdest beverage packaging innovation I've seen in a while. Obviously it's nice that they're lighter and shatterproofer than glass bottles, but don't real cans actually have a better freshness seal than bottles, aluminum or otherwise? Drinking from aluminum is dud of course, so I'm pouring into a nice mug.

The other issue is the beverage itself, natch. Until tonite, I'd only seen this stuff holding Bud, so ignored it. What I'm drinking right now though, is Iron City - a beer I've long heard of but never tried, because it doesn't make it down here, until now. It's a nice, light, crisp pilsner, ain't it? Not on the level of Urquell , mind you, but not bad at all.