Have some fun while you sip with this color-changing tumbler! This 24-ounce product is made of polypropylene and changes color once its temperature drops below 53 degrees Fahrenheit and cold liquids or ice are added in. You can enjoy peace of mind knowing that this item is made of safe materials and is reusable and BPA-free. And with a lid and straw included, you can take this tumbler with you without worrying about it spilling or leaking. Transform your next tradeshow giveaway with this dazzling promotional product!