Can beer be recarbonated? I was perusing a question about uses for flat beer ("Are there any good uses for beer that has sat in my growler for too long?") when I came across an answer that mentioned "any use that doesn't require it to be carbonated would be fitting".

If I have flat beer, and I have, say, a sodastream (or some such), can I effectively re-carbonate my beer? What would be the disadvantage to doing so?
Sodastream: maybe, but at your own risk.

According to Sodastream's FAQ, "You risk damaging your soda maker, not to mention making a big fizzy mess!".  However, there are a few articles discussing how to carbonate non-water with one.

Anecdotes vary:


It overpressurized and sprayed beer everywhere
It worked fine, but go slow
Wild success!


Some tips:


It will definitely void your warranty
Use plastic, not glass, bottles to avoid shrapnel if you make a mistake.
Take your time; most reports indicate it's easy to over-carbonate your beer.