Java holders are containers used to store and serve hot beverages such as coffee and tea. MUGS and URNS are two common types of Java holders. MUGS are typically cylindrical with a handle and a wide opening at the top, while URNS are usually taller and more slender with a spout for pouring. Both MUGS and URNS are often decorated with designs or logos and can be made from a variety of materials such as ceramic, glass, or metal.