Frisco Tennis Ball With Rubber Sleeve The Frisco Tennis Ball With Rubber Sleeve ($4) comes with a reusable rubber sleeve that prolongs the life span of most medium-sized balls. If you're always buying new tennis balls for your best furry friend, this is a $4 investment you can't afford to pass up. Image Source: chewy.com Frisco Tennis Ball With Rubber Sleeve $4 from chewy.com Buy Now