I probably should comment on the potential toxic hazard created by burning the water insoluble ink off the beer can inside a bird.
Then there is also the internal lining used by some companies to keep the beer 'fresh' that may not combust into particularly nice compounds.
But hey, enjoy the flavour!!
(If you use canned Guinness at least remove the widget first ok?)

And eating food cooked over a fire can give you cancer, but you have to die of something. If you eat healthily you don't live longer -- it just feels like you do.

My cans always come out relatively intact and undamaged --not scorched or oozing poinsonous ink.

However, if you're still paranoid, you can always substitute the can for a wide-mounth jelly or pickle jar. It just happens that the aluminum can is the perfect chicken butt plug.

Thank you peter for the lovely description of possibilities but i think i will stick to using materials that i know are free of anything produced by Dupont.

what about Nylon?

I won't cook nylon inside the bird either.
Nor polyester.
I don't believe they would be much better than the ink.
(Studies pending i'm sure.)

It was my good fortune to be able to go out to the lake yesterday and drink mass quantities. However, judging by my hangover today, one of those beers may have been of inferior quality. The suspects: Molson Canadian, Bass Ale, Sam Adams, Bud Light, Stone Pale Ale, Main St. Brewery's Wit, IPA, and Pale Ale. I'm guessing it's the Molson.

Mornin' BigWill.. Was it hot this weekend or WHAT ?!?
My wife and I also got out of town and took a trip up to the cabin.. Barton Flats, on the way to Big Bear..
Finding some bottles of Sam Adams in the fridge, I couldn't recall if I had brought it up there to get it out of the house, or as a special treat for my next visit ?
Upon popping the cap and taking a long slow pull it all came back to me.. Yuck, Banished Booze !! hahaa
Lucky for me I had stashed some Tecate up there, so all was not lost..

i,m leaning towards Bud's Light

I'm betting on the Bud Light, too. Bud uses quite a bit of rice in their mash, and it always gave me a headache until I realized the connection. Some chemist could probably explain how the size of the protiens from the different grains impacts the molecular structure of the final product, but I'd just want another cold Full Sail.

It is ALL ball bearings nowadays.