A durable and convenient mug for your travel! Tanze 13.5 oz. Travel Mugs are made of high - quality stainless steel that is powder - coated with vibrant colors. They have a double - wall vacuum insulation that keeps your drinks hot for up to 4 hours and cold for up to 6 hours. The transparent charcoal push lid lets you see how much drink you have left and has a secure seal that prevents spills and leaks. They come with a comfortable handle that makes them easy to hold and carry. It's a perfect companion for your travels, work, school, or home. Rush 3 days available with rush charge upon request. Imprint drinkware only can be hand washed except when laser engraved which is dishwasher safe.