Have you tried the bottles? I like them better than the cans. And they have a cool widget-thinie inside as well (different from that carbon-filter thing in the can).
And diced onions mixed into the ground beef prior to cooking rocks! My mom used to do that with burgers, meatballs, etc. when I was younger, and I do the same thing. When I showed my wife, she couldn't believe it (nor did she want her burger like that, she hates onions).