Pittsburgh Brewing Company is now selling their beer in 12oz aluminum bottles. They're supposed to stay colder 3x longer than a regular glass bottle.

www.pittsburghbrewingco.com

There's a picture of them on the home page (once you enter your birthdate).

colder...no way....get colder faster....I believe that.
Its more expense than glass and Heinikin tryed it earlier this year for specific venues....the excess were sold to large stores and didnt sell well.

Great idea though.