At Mason-re we continue to innovate with the world's first silicone koozie for the 12oz mason jar paired with an eco fiber child resistant lid to create the perfect reusable stash jar. As usual the koozie fits like a tailored glove and is made from 100% silicone. Our lids are made in America from FDA Polypropylene that is 30% repurposed farm waste and hemp fibers, allowing you to store your stash safely away from children as well as sunlight.