This bottle is made of durable plastic. The Autoseal technology ensures that the lid is leak-proof and spill-proof, making it perfect for travel or outdoor activities. The easy-to-clean lid is also top-rack dishwasher safe, along with the body of the bottle. With its convenient size and reliable performance, the Contigo Autoseal Cortland Water Bottle is a must-have for anyone who wants to stay hydrated throughout the day.