The LifeVenture Vacuum Flasks feature a sleek design that won't snag or catch on items inside your pack. They'll keep drinks hot for up to 8 hours or cold for 24 hours and are incredibly strong and durable. This 500ml Thermally-induced Vacuum flask comes with a traditional screw-in stopper with pouring spout. The stainless steel lid can be used as a cup. Its the perfect size for one or two people on a day walk