This Design for Living Hot and Cold 4 Piece Coffee Set includes on-the-go mugs for all your needs. The push-button coffee mugs keep your drinks hot while helping prevent spills by using a unique opening mechanism. Simply press the conveniently located center activation button to sip and press again to seal. The reusable plastic iced coffee mugs with straws and lids offer a reusable way to take your cold drinks with you. The mugs are very durable, will not retain odors or tastes, and are designed to fit most standard car cup holders. 4 piece set includes two 13 ounce push button hot coffee mugs and two 16 ounce plastic mugs with straws and lids. Push-button coffee mugs are hand-wash only; plastic mugs are dishwasher safe.