By Danielle Dellorto, CNN Medical Producer (CNN) – From supermarkets to the office supply store, it's hard to miss those tiny bottles of 5-hour Energy. [cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2009/images/07/15/art.energy.drink.ad.ho.jpg caption="The makers of 5-hour Energy call it a 'no-nonsense drink.’"] "It would be easier for me to tell you where we didn't sell them in the U.S. … Continue reading Small drinks promise big energy, but experts say effects unclear