The grooves in the Kong Licks hold kibble, treats, peanut butter and more for long-lasting licking. These can help fight boredom and or distract your dog during tricky stuff like baths and nail trims. Plus, licking releases endorphins that help soothe dogs. Two suction cups stick to flat surfaces for a movable feast of fun. Different ridge shapes hold variety of food, keeps pups interested and helps clean tongue and teeth.