Refilling your reusable water bottle just got a whole lot easier. Meet the reusable bottle that is putting single-use water bottles out of business. By using a Dopper bottle you can prevent 40 single-use plastic bottles from polluting our oceans each year. The Insulated Dopper Glass water bottle keeps your drinks warm for 9 hours and cold for 24 hours. Made from durable materials, this glass bottle is perfect to take with you anywhere. 450 ml.