From workout to hiking session - our Maars Charger 40 Oz Tumbler is the perfect companion for all your adventures. Made from food grade 18/8 stainless steel with a double walled vacuum insulated construction to keep beverages cold and hot for hours. Tumbler comes equipped with a large ergonomic handle for easy carrying throughout the day. Twist on, slide lid prevents accidental spills and splashes. Fits in standard sized cupholders for easy traveling and comes with straw.