How to serve this kind of coffee is known as Kupi Khop or Coffee Covered. That said, the coffee glass behind was inspired by the Teuku Umar hat model. Kupi Khop is often found on the coast of West Aceh, identical as a drink among sailors. 
This coffee is deliberately served upside down to stay warm and free of dust when left to sea. In addition, the coffee served upside down influences the flavor offered because the aroma of coffee stays awake in a glass.