This Mason jar koozie made from 3mm neoprene insulates your jar while it creates the perfect grip. All Jar-Z Mason jar jackets are custom made to fit various sized mason jars. It slips from the bottom up and to the lid, perfectly insulating your drink. Available in a wide range of bright colors and sizes include half gallon, half pint, pint and a half, and pints. You can use the transformed jars as usual and it acts as much more than just a decorative jacket. It is attractive, but first and foremost is it a drink insulator, keeping hot drinks warmer for longer without causing your to leave your drink to cool down before you could enjoy it.