The Nina Ottosson by Outward Hound Treat Tumble is a perfect puzzle ball for any pup! A level 1 treat-dispensing dog puzzle, the Treat Tumbler will keep your dog intrigued as they roll the ball and sniff around to find ways to release the reward. Easy to fill with two treat-dispensing holes. Made with food safe BPA-free plastic that is easy to wipe clean for outdoor and indoor fun!