I'm a noob and getting ready to brew my first batch next week. I'm drinking a bunch of different beers, and keeping the bottles for bottling my brew. I bought a six pack of Guinness Draught bottles, which I normally have only gotten at a bar from the tap. These bottles have a "widget" in them, that I guess is supposed to give them an authentic taste. Are these bottles OK to use for my own bottling? The widget will not come out, so as long as I clean and sanitize the bottle, can I use it? Will the widget affect my beer in a bad way? What exactly does it do? Thanks.