We are not wine connoisseurs by any means, but what we have been told is that serving wine at the correct temperature plays a pretty big role in getting the most out of it. Enter the clip on wine thermometer. Simply snap it onto the outside of your soon to be served bottle of wine and it will tell you whether that particular type of wine is in the optimal range for being served. Best of all, it doesn't require batteries. The band is heat sensitive, just like the type you see on the side of aquariums.