EL PASO — Taco Bell is adding a breakfast soda to its "first-meal menu."

It's a mix of Mountain Dew soda and Tropicana orange juice, feeding off the popularity of energy drinks.

There are no details on the ratio of O.J. to soda, or how widely it will be available before becoming a regular part of the breakfast menu.

The Mexican-style chain introduced breakfast at about 8-hundred restaurants earlier this year.