Metallic-colored cap. Twist-off screw system allows you to open and close the cap with a twist. Keep the liner inside the cap at all times# it should be removed only at the final use. Make sure the cap is not fully closed. Do not expose the cylinder to temperatures above 40°C during storage and transport. Keep in its individual packaging before and after transformation. Not suitable for hot drinks. Do not microwave or wash in the dishwasher.