coffee drinkers

I discovered that in the hot-for-cold tradeoff, odds are you're getting royally screwed.
We ask the embarrassing questions so you don't have to.
The honest truth about what you're up against every morning.
Three hundred years ago, during the Age of Enlightenment, the coffee house became the center of innovation. Back then, most people went from drinking beer to consuming coffee (i.e. from being tipsy to being wired) and ideas started exploding.
Why do coffee stains always form a ring?