We need a packaging designed for storage of hot beverages (tea/coffee with milk) to keep them hot and fresh for consumption at least for 2 hours. Also, some kind of heat insulation might also be required for it to be easily held (it's need depends on idea to idea). It has to be really cheap as it's meant to be disposable. For a rough idea, it may be similar to the paperboat packages with the capacity to store hot beverage.