Even though mugs with lids keep your hot drinks hot and cold drinks cold. My favorite way to drink coffee sipping it out of an open mug. One of my biggest complaints about mugs with no lids is that the hot coffee gets cold too fast, and my iced coffee melts too soon.  This cup solves that problem!  Not only does it have a beautiful design, the double walls help to maintain the temperature of the beverage!  As an added bonus, if you like to make fancy lattes with foam or cream, have a clear glass cup allows you to view the amazing richness and color of your coffee or tea.