Choosing which drink to go with your Taco Bell combo may get a little more difficult.{} The Mexican food fast-food chain is rolling out an expanded drink menu.{} Six new beverages will be added Friday.{} Three of the new drinks will be carbonated, and three non-carbonated.The biggest of the bunch is expected to be a fruit-infused Mountain Dew Sangrita Blast.{} This soda will be available only at Taco Bell.{} There's also Manzanita Sol.{} It's an apple-flavored soda.{} The third soda is Diet Mountain Dew Baja Blast.{} The non-carbonated options include two Brisk tea drinks.{} Brisk Mango iced tea and Brisk Half and Half will be featured along with SoBe Lifewater Yumberry Pomegranate.So why is there so much focus on the beverages?{} About 56% of fast-food purchases involved a beverage last year, says NPD Group/CREST.{} Drinks can account for 30-40% of business for fast-food restaurants.{} This beverage line roll out is rare.{} Often one or two new items come out at a time.{} You don't often see six in a single promotion.