Parsippany, NJ — Specially marked packs of Stride Shift gum contain instant-win messages, giving consumers the chance to win trips to two concerts in major cities.

Through December 31, consumers can send in packs with a “You're a winner!” message to be awarded one of 100 grand prizes, according to Cadbury Adams USA, LLC.

Each grand prize consists of a four-day, three-night trip for two to New York City and Los Angeles, as well as tickets to see Shift-sponsored concerts featuring the bands Panic! At the Disco and Cobra Starship.