Petface Toyz Crinkle Dumbell Green/Red. The Petface Toyz Crinkle Dumbell offers a strong and durable toy that your dog can play with. The Petface Toyz Crinkle Dumbell features a hard outer ball with a softer ball in the middle creating hours of fun for you and your dog* Pets should be supervised whilst playing with toys. Although Petface toys have been designed to be strong they are not indestructible and will be susceptible to chew damage. The life of a Petface toy depends on the ability and strength of your pet. Monitor for wear and replace if damaged*