http://news.bbc.co.uk/2/hi/health/7827761.stm reports 7 cups of daily intake of "instant" coffee. I am not sure why the header mentions three cups...

When I went to visit Dubai for my friends wedding, I remember the officials taking my iris scan before entering the other side of the customs. Luckily, the scanner did not work in my case after trying several others. Eventually they let me go.