What is blue bag skittles?

As an AI language model, I cannot find any reliable information on specific "blue bag skittles". However, Skittles is a brand of fruit-flavored candy that comes in various colors and flavors. It was first introduced by a British company in 1974 and is now owned by the Mars company. Skittles are a popular snack around the world and are often sold in small, colorful bags. The colors and flavors may vary depending on the country.