Promotional Dopper Travel Mug (300ml) Whether it's morning coffee, midday hydration, or an evening sparkling drink, this Dopper Travel Mug is made to handle it all. It keeps hot drinks warm for up to 6 hours and cold drinks cool for up to 20 hours. Designed with a double-walled stainless steel body made from 90% recycled steel and finished with a durable powder coating. The easy-to-open flip cap makes sipping on the go simple and convenient. Dishwasher safe (without print) up to 65 °C. Please note, some staining or odor may occur when used with tea or coffee. Use caution with hot beverages.