With white illustrations on a black background, this Harry Potter 20th Anniversary stainless steel travel mug kind of looks like a vandalized chalkboard inside a Hogwart's classroom. Pretty cool! The travel mug holds 20 ounces and its double-wall vacuum insulation and copper-lined stainless steel keeps your cold drinks cold and your hot drinks piping! Now, what's the magic spell that magically gets all our work done for us? -Up to 24 hours cold and 8 hours hot -Double-wall vacuum insulation and copper-lined 188 stainless steel with leak-resistant, easy-close lid -Do not put tumbler in dishwasher, freezer, or microwave