I don't know if anyone has tried this. I made a stout recently and bottled it in those guiness bottles with the widget inside, hoping for the same creamy foam. While it was bottling I found out it is nitrogen and not just the widget that does it. Here is the strange thing: All the beers in regular bottles are normal stout and open fine, all the guiness bottles however foam over like crazy when you open them, and It seems that the initial foamover is the creamy guiness foam...is it possible that some nitrogen gets trapped in the widget somehow?I mean you could argue that maybe when a stout foams over, the head looks creamier but then why do only the guiness bottles explode like this? Has anyone else experienced this?