Paper cups "to go" were yesterday. Get the new thermal mug from SIGG so that you always have your beloved coffee or tea with you. The stainless steel mug is double-walled and vacuum insulated, so it keeps 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 the way to work or as an insulated mug for tea and other hot drinks - the Miracle Mug is durable and free of harmful substances.