Make Fetch Happen? on land and in water with the Chuckit!? Amphibious? Mega Ball! Featuring a lightweight, foam core, this ball floats high on the water and is unsinkable! Ideal for medium to large water-loving canines, the Amphibious Mega Ball is Made from durable lightweight materials and is gentle on your dog's mouth as they fetch the ball. The bright orange color makes the ball easy to spot both on land and in water. Keep your dog cool all summer long with a Chuckit! Amphibious Mega Ball.