Kong Rewards Tennis Small. KONG Rewards Tennis adds a topspin to treat-dispensing that rewards with kibble, treats and fun with every action-packed roll. Built from durable materials and featuring unpredictable movement this toy is sure to keep dogs engaged while providing mental and physical enrichment. An easy-fill funnel makes repeated use simple. Can also be used as a food bowl replacement to help manage weight. Fun, durable shape provides rewarding enrichment. Ideal as a food bowl replacement for weight management. Easy-fill funnel for adding kibble and treats. Unpredictable movement keeps dogs engaged. Available in sizes: Small (8.25 x 8.25cm) and Large (13.9 x 13.9cm). Materials 100% TPR- Thermoplastic Rubber.