The Contigo Shake & Go Tumbler 20 oz with Autoclose lid in Blue & White is a screw-on lid tumbler made of BPA-free plastic. It is a refillable and dishwasher safe water bottle that features a double wall design, making it perfect for outdoor activities like camping and hiking. The Autoclose lid ensures a secure seal and the 20 oz volume is ideal for staying hydrated on the go. This BPA-free tumbler is both reusable and convenient for those looking for a reliable and durable water bottle.