chilly and hot beverages! Simple to hold design! Did you realize that foam cups are more insulating than paper ones? By doing this, you can avoid using a cup sleeve or a second cup. It uses less energy to use foam cups. Before using reusable cups becomes as energy-efficient as using disposable foam cups, a ceramic mug must be cleaned and reused 1,006 times, and a glass must be cleaned and reused 393 times (Hocking, Reusable versus Disposable Cups: An Energy-Based Evaluation, Environmental Management 18, pp. 889-899 ). Foam cups make up a very little portion of our waste. Foam cups and other polystyrene foodservice items account for less than 1% of the material dumped in municipal solid waste, both in terms of weight and volume (Franklin Associates, Ltd., Municipal Solid Waste in the United States 2003 Facts and Figures, prepared).