The Yeti Rambler is tough enough to keep up with the most intense of your outdoor adventures. Made from durable stainless steel with double-wall vacuum insulation, it keeps drinks hot or cold all day. Rugged stainless steel construction resists dents and dings. Double-wall vacuum insulation keeps cold drinks cold and hot drinks hot until the last sip. Innovative MagSlider lid uses magnets to keep it reliably open or closed Lid design prevents splashes and spills.