PetSafe Twist 'n Treat Dog Toy, Use with Food or Treats SIMPLE &amp; CONVENIENT: Two pieces twist together to hold your dog's favorite food or treats ADJUSTABLE: Easily change the opening size to adjust the challenge level for your dog FIRM NATURAL RUBBER: Durable, but NOT recommended for strong or aggressive chewers VERSATILE: Fun to use with dry treats, wet food or smearables such as peanut butter; even use as a feeder with kibble SIZE INFORMATION: For dogs over 50 lb. DISHWASHER SAFE: Top rack only, take apart for easy cleaning HERE TO HELP: Call, email or chat with our expert U.S.-based customer care specialists Monday through Saturday at 1-800-845-3274 or ccc3@petsafe.net; they are ready to assist you and your pet EXPERIENCE: PetSafe has been an industry leading U.S. manufacturer of pet behavior, containment and lifestyle products since 1991, helping millions of people and pets each year