If you use the 8 or 10 cups Chemex to make a big pot of coffee in the cold winter, you probably want to keep it warm. According to Chemex’s official instruction[1], Chemex can be placed on a glass stovetop or gas flame at low heat directly. But you can’t put it directly on an electric coil stovetop without the particular stainless steel wire grid provided by Chemex.  I know how beautiful the coffee looks in the glass Chemex, but decanting the coffee to a thermos or insulated travel mug is another easy way to keep it warm.