For filtered coffee, coffee mocha, iced coffee or any blended iced coffee beverage, this style of cup is recommended. Use them, too, for hot chocolate, hot tea or iced tea. They're made of durable fine-white porcelain, and are professionally-weighted to maintain heat and to keep the drink warm longer. Highly durable, the porcelain mugs are dishwasher- and microwave-safe.Coffee Bar by Konitz is a collection of cups for all hot drinks, each shape individually developed to maximize the unique aroma of the specific beverage. By working with international coffee experts, Konitz has created a unique collection of vessels for your drinking pleasure.