Promotional Thermoses & Vacuum, Copper Vacuum Insulated Bottle 17oz - 48hr Cold & 12hr Hot, Bottle is double wall 18/8 grade stainless steel with vacuum insulation. Inner wall is plated with copper for ultimate conductivity to keep drinks hot for 12 hours and cold for 48 hours. 17oz. •Material: 18/8 grade stainless steel •Double-wall construction plus copper vacuum insulation •Interior wall has copper plating for maximum conductivity •Keeps beverages cold for up to 48 hours or hot for up to 12 hours •Condensation-free ... #1624-74 $10.27/each.