Culver Double Walled Insulated Plastic Mason Jar Tumbler with Twist Lid and Straw, 20-Ounce, Maroon Double walled insulated handled mason jar tumbler composed of BPA Free plastic 20-ounce capacity with twist screw on lid and straw included - the lid and straw are color coordinated with bottom of jar tumbler Hand wash recommended, not safe in microwave Double walled to prolong beverage temperature Perfect for hot and cold drinks