The Coldest BNIB 46 oz “Bouquet of Sunflowers” with Custom Boot is a multicolor stainless steel tumbler that can keep beverages hot for 10 hours and cold for 36 hours. It features a twist lid, floral sunflower pattern, and comes with a custom boot. This one-piece tumbler is perfect for adults and includes a manufacturer lifetime warranty. With a 46 oz capacity, this tumbler is leak-proof and includes a handle, lids, straws, and is easy to clean with hand wash only. Ideal for both hot and cold beverages, this tumbler is a stylish and practical choice for anyone looking to enjoy their favorite drinks on the go.