This versatile vessel pulls its weight around the fire, keeping coffee warm until the last sip and beers cold until the keg is tapped. The cup holder friendly Rambler® 591 ml Stackable Cup comes with the splash resistant, MagSlider™™™ Lid to protect your beverage while on the go. Like the entire Rambler® Family, it's over engineered to survive extreme adventures and double-wall insulated so your beer is ice cold or your coffee is hot from the first sip to the last. Please note: This magnet slider is not leakproof and will not prevent spills.