(http://i62.tinypic.com/24qo3g7.jpg)
(http://i57.tinypic.com/300tyqs.jpg)
reddit (https://www.reddit.com/r/pics/comments/2lj18t/they_were_giving_samples_of_thisit_actually/)
Confirmed by Pepsi themselves:
We are always testing out new flavors of Mountain Dew, and giving our fans a voice in helping decide on the next new product has always been important to us. We opened up the DEW flavor vault and gave students a chance to try this Doritos-inspired flavor as part of a small program at colleges and universities. VIA (http://qz.com/293298/confirmed-doritos-flavored-mountain-dew-is-for-real/)
why Pepsi why!? (making internet fantasies a reality) ;D