Perfect for packaging. The perfect crackers for happy snackers. From packed lunches to afternoon munches, Snack Stacks fill every moment with buttery, flaky texture. Go ahead-grab a stack and get snacking. Sustainable Forestry Initiative: Certified Sourcing. www.sfiprogram.org. Kellogg's Family Rewards: Collect points. Earn rewards. Two easy ways to collect points! Go to KFR.com to learn more.