We love the simplicity of this tug - it is one of Kwis' all time favourites! The milker bungee tug combines the simplicity of a simple rubber milker with the durability of a nylon core and 10 inch bungee line. *Note that hard biting dogs (like Kwis) may tear chunks of milker off the tug over time, but the tug itself stays intact with a slowly shrinking bite surface.