One of my New Year's resolutions - drink less coffee. I have cut down significantly - one cup a day and now drink those infusion things. I am actually getting used to them - but a useful side effect is that I drink more water.
what? You go straight to the bowels? Whatever floats your boat I guess!
Both tea and coffee go straight through me. I very rarely drink builders tea or instant coffee these days. Instant tastes of nothing but two makes my gut feel bad. For me, it's a single cup of 'proper' coffee (i.e. fresh ground) a day and then only green tea.