Stainless Steel Insulated Coffee Cup with Lid 350ml 5 "Perfect" Mrs Parkin 20 June 2018 This mug fits many kinds of cup holders, ideal when travelling. It stays warm for hours if you charge it with boiling water before filling with your coffee. The lid is easy to clean with hot water from the kettle and it has never leaked. I've recommended this travel mug to friends and they are pleased too. Although I've never used it for cool drinks, my friend, who is a teacher, stays hydrated with cold water all day! Excellent product. Great value for money.