" The British claim that this tea has a negligible amount of caffeine. Don't you believe it. A couple of months after moving to London, convinced I was having panic attacks, I realized it was simply overcaffeination at the hands of generous friends and colleagues. Every cup of tea I was offered, I took–it seemed rude not to–to the tune of five of seven per day. The cumulative effects were heart-pounding, hand-sweating jitters that abated as soon as I learned my limits. "

― , That's Not English: Britishisms, Americanisms, and What Our English Says About Us