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
Special notice for shipments to the state of California