PepsiCo Inc, in conjunction with Yum Brands, has launched a drink exclusively in Taco Bell resturants, a Yum Brands subsidiary.

Taco Bell and Pepsi have introduced Mountain Dew Baja Blast, a lime-flavored, turquoise-colored soft drink.

It is aimed specifically at aimed at drive-thru customers who do not buy a drink with their meals.

It is believed it is the first soft drink brand to be developed specifically for sale at a fast-food chain.

Pepsi declined to say how much it spent on developing Baja Blast, but a Reuters report quoted a Taco Bell spokesman who estimated it had spent "a couple of million dollars" on development and between US$4m and US$5m on the drink's launch.