This is a handmade mug that can be used for coffee, tea or any other drink of your choice. It is made from Stoneware clay on the pottery wheel. It was dipped in a wood ash glaze called a Nuka glaze, and then brushed with an iron, rust colored stain to give an earthen, rustic tones. The rust dripped down the glazed pot during the firing, creating red and yellow colors in the cream colored base glaze. The mug is 100% functional, dishwasher safe and microwaveable. It measures about 3.5" tall, width 4.5" including handle. Grab your brand new mug pour a cup of coffee and enjoy the experience.