Using this tumbler is easy. Just open the BPA - free sliding lid, pour in your favorite drink, and close it. You can use it for your daily activities like going to the gym, driving, or working in the office. It fits standard car cup - holders, so it's perfect for travel. Remember, this tumbler is not suitable for the dishwasher or microwave. To keep it in good condition, hand wash it. This will help preserve the bright colors of the 3D inflated effect print on the flat surface. With its high - quality stainless steel and double - walled vacuum insulation, it will keep your drinks at the right temperature for a long time. And don't worry about water stains as it's sweat - free. You can choose from many cool designs to make it unique. It also makes a great gift for various occasions with a meaningful message included.