SAN FRANCISCO: Popchips, the maker of all-natural potato chips, is kicking off the summer with a few new flavors and a mobile snack tour in key cities. The tour is part of a larger marketing campaign that is "tying everything together with a limited amount of targeted advertising, our PR, and our sampling campaign," said Keith Belling, founder and CEO of Popchips.

Working with PR AOR Formula PR, Popchips is going out with the message "make snacking fun ...