This IN-N-OUT Burger 30 oz tumbler is perfect for both hot and cold beverages. It's a great addition to any IN-N-OUT Burger collector's stash. The black color and original design make it a unique piece of fast food advertising memorabilia. The travel mug is made of high-quality materials and is built to last. It's a must-have for any fast food enthusiast who loves IN-N-OUT Burger. Keep it out of the dishwasher and microwave. It would be bad if you did. The microwave would not like the stainless steel. I don't know what's the dishwasher problem is. Just don't.