The redbull already has caffiene, so what you're talking about is a potential caffiene overdose,although frankly, it won't be good if you make your coffee from beans. read more
Red Bull has its refined taste in it, it's totally different from coffee. Red Bull has a component that is similar to caffeine so, it like overdose of caffeine in one drink. In addition to that Red Bull has no water to infuse coffee in it. Don't try out weird combinations it might hurt your health. Hope it was helpful. read more
Do some research on what happens to the contents of redbull when you boil it, which is probably nothing, apart from the carbonation making a mess, and know that anything that you put through a coffee maker, other than pure distilled water will probably end up stuck to the piping inside instead of in your drink. read more