Cool Change Color Changing Kid's Mason Jar Set with Lid and Handle, 17 oz, Multicolor This set includes 2 plastic mason jars with a lid and handle Simply add your favorite cold beverage and watch as the mason jar magically changes colors before your eyes The 17 ounce plastic mason jars are reusable and durable for multiple uses Cool Change products are the perfect party favor, birthday gift or and everyday kitchen item for the kids Cool Change products are No. 5 recyclable, BPA free and FDA approved