Green Mountain Half-Caff K-Cups Enjoy the full flavor of coffee with half the caffeine. Green Mountain Half-Caff is a smooth, well-balanced blend that’s ideal for team members who want to cut back on caffeine without compromising taste. Brewed fresh in any Keurig® brewer, it’s a great midday option for professionals who enjoy a flavorful cup that’s gentle enough to sip throughout the day.