What is blue mt dew?

As an AI language model, I don't have access to the latest information or any updates, but here's some basic information about Blue Mountain Dew:

Mountain Dew is a carbonated soft drink that is produced and owned by PepsiCo. Blue Mountain Dew was a limited edition flavor of Mountain Dew that was introduced in 2014. It was described as a "berry lime" flavored drink and had a vibrant blue color. The flavor was inspired by Dew's sponsorship of NASCAR driver Dale Earnhardt Jr., who is known for his love of all things blue and lime. Blue Mountain Dew was only available for a limited time and has since been discontinued. However, Mountain Dew has announced and released other limited-time flavors including Baja Blast, Code Red, and Game Fuel.