Disposable cups "to go" are a thing of the past. Get the new thermos mug from SIGG so you can always have your beloved coffee or tea with you. The stainless steel mug is double-walled and vacuum insulated, keeping your drinks hot or cold for hours. It is leak-proof thanks to a safety button: press to drink and release to close! Whether as a coffee mug on your way to work or as an insulated cup for tea and other hot beverages – the Miracle Mug is durable and free from harmful substances.