The TRIXIE Treat Tumbler Snack Ball is a great puzzle ball for your furry friend. It's a level 1 treat-dispensing dog puzzle that will entertain your dog as they roll the ball and try to release the treat. The Treat Tumbler is easy to fill by twisting it open and filling it with your dog's favorite treat. You can increase the difficulty level by inserting the inner chamber plate and controlling the amount of treats released with the adjustable opening. It's made of food-safe BPA, phthalate, and lead-free plastic that is easy to wipe clean. The puzzle is dishwasher-safe, so you can effortlessly keep it clean and hygienic. You can use this puzzle ball indoors or outdoors to keep your pup engaged and having fun.