In the retail beverage industry, shelf space in stores is prime real estate. If a flavor is not selling as well as the store had hoped, its space is reallocated to other flavors that are more popular. This is the case with Snapple's Mint Tea. It was not widely distributed. It was discontinued in 2007 because Dr. Pepper Snapple Group, who owns over 50 brands of beverages, said that sales were too soft and shelf space was limited.
However, in 2009, Mint Tea did make a brief comeback as a seasonal promotion after consumers continued to show demand for it, going as far as creating an online petition to bring it back. Sadly, the comeback was only temporary.
Snapple has withdrawn over 60 flavors over the history of the company. It's often not because people didn't like it, but because it was not as popular compared to other flavors. Some flavors were discontinued because the idea was just too unconventional, like Cactus Tea.