Enjoy your favorite cold or hot beverage anytime, anywhere, even where you can't use glass. Triple-insulated stainless steel will keep your drink cold for up to 9 hours, even in the sun or drink hot for up to 3 hours too! Includes shatterproof plastic lid designed to be sipped through and spill resistant. Easy-grip flat sides and no-slip bottom means this tumbler will stay where you put it. Built in slider is easy to use and when closed between sips help the tumbler maintain temperatures.