Alfi 5817205035 Insulating cup isoMug Perfect, 0:35 L, stainless steel (houseware)
This IsoMugs are just awesome - keep hot drinks up to 3 hours very hot, up to 5 hours very warm. The only slight drawback: The colored Mugs indeed look visually great but are very sensitive to scratches. However, they are very easy to clean by hand,