Constructed of stainless steel for sustainable sipping, our 40 oz Intrepid Stainless Steel Tumbler offers maximum hydration with fewer refills. Commuting, workouts, day trips or your front porch—you’ll want this tumbler by your side. Thanks to vacuum insulation, your water will stay ice-cold, for up to 24 hours and hot up to 8 hours! The handle makes it easy for carrying, and the narrow base fits just about any car cup holder.