The Rambler™ 20 oz Tumbler is a next-level addition to your rough commutes, day hikes, or kayak trips and with the new MagSlider lid, it’s designed for easy opening and closing. This tough bottle is double-wall vacuum insulated to keep your water cold (or coffee hot) until the last sip, and its 18/8 stainless steel construction can stand up to even the roughest of conditions.