The Polypropylene Tumblers are made of 50% recycled plastic and this is safe for food or beverage, so you don't have to worry about the health of your families. Plastic tumblers are sturdy and soft enough to fulllfil your every purpose. Our high quality tumbler is break resistant which is great for using outdoor. This is also easy to clean and stackable to save spaces. Remember to not put it into microwave or oven and wash only on the top rack of dishwasher!