Zyliss Hot Mug Cafetière With the Zyliss Hot Mug it's never been easier to enjoy freshly brewed coffee on the go. Simply fill it with your choice of ground coffee, add hot water and the built-in fine mesh plunger will compress the grounds to make the perfect brew. It's designed with double wall insulation to keep it warm until you're ready, so it's great for taking to work. Ideal for coffee, tea and hot chocolate Fine mesh filter compacts coffee ground Double wall insulation to keep contents warm Lid for easy transportation Dishwasher safe 5-year guarantee