Are you looking for a cool giveaway to promote your event? This half liter (1/2 liter) bottle insulator is designed to fit most 16 to 20 oz. bottles. It is made out of neoprene (wetsuit rubber material) and comes with a plastic hook for easy carrying. Empty, blank plastic bottles can be included in your order for an extra charge. Customize this four color process bottle with your imprint and hand them out during your next promotion!