Planet Dog Orbee Tuff Mazee Ball Toy is clearly engaging, clearly rewarding, and clearly fun! This interactive puzzle toy offers hours of long lasting, brain stimulating entertainment for dogs of any size. The translucent and pliable Orbee Tuff outer shell combined with the harder inner maze activates several of the dog's senses - they can hear, see, and smell the treats while they solve the puzzle. Stuff with Planet Dog Treats and enjoy. Mazee is designed to activate a dog's mind and energize its play. Guaranteed to stimulate, spark, and excite! Although Mazee is built for durability, it's intended for puzzle play, not chewing, so it is not rated on our durability scale. Mazee is not to be left with dogs unattended. Easy to clean by hand, or on the top rack of the dishwasher.