Turn Your Mason Jar into a Travel Mug Reusable drink lid transforms wide-mouth canning jars into the perfect travel mug that's easy to sip and enjoy. It's a convenient alternative to cheap plastic travel mugs and disposal cups. Use again and again. Includes 1 Cuppow wide-mouth drinking lid (you supply jar and band). Comfortably sip your favorite drink on-the-go or at your desk - great for hot or cold beverages . Compatible with most flexible straws . Fits standard wide-mouth Mason jars . Made of recyclable plastic . Color: Clear . Dimensions: 3.33" x 3.33" x 0.62" . USA made . Note: Not for canning or heat processing. Lids are safe for hot and cold drinks. We recommend using an insulated cover or sleeve around your canning jar when using it with hot drinks because the glass will become hot.