Empress Polypropylene cups are a great choice for all of your cup needs. They are made of a thick polypropylene, most often used for cold liquids, but strong enough to hold warm liquids too. Polypropylene has a good chemical resistance, serves as a good vapor barrier and is fully recyclable. In fact, polypropylene is easier to recycle than almost any other plastic, reducing environmental impact. Empress Polypropylene cups have an extraordinary clarity, and are crack resistant. With availability of sizes ranging from 5 oz up to 16 oz there is sure to be a cup to suit your needs.