Parent company: Coca-Cola
Pct. change in gallons sold: -37 percent
Gallons sold 2001: 260.7
Gallons sold 2010: 165.4
Caffeine Free Diet Coke has had the second greatest decrease in gallons sold since 2001. This is most likely the result of newer options. There are a number of relatively healthy caffeine-free beverages available, such as juices and bottled water. Coca-Cola also sells now caffeine free Coca-Cola Zero, an extremely similar product to Caffeine Free Diet Coke.
(AP Photo/Darron Cummings) More From 24/7 Wall Street: 8 Beers Americans No Longer Drink Breakfast Cereals Americans No Longer Love Disappearing Restaurant Chains The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.