Twist-off screw cap system that allows opening and closing with a twist. Features two silicone elastic bands, one on the neck and one on the base of the cylinder. Keep the liner inside the cap at all times, remove it only for final use. The liner helps prevent vacuum and damage to the cylinder body. Ensure the cap is not fully closed. Do not expose the cylinder to temperatures above 40°C during storage and transportation. Keep in individual packaging before and after transformation.