The Field Museum bottle is a 17 oz double wall 18/8 stainless steel vacuum thermal bottle with a threaded insulated lid.
The stainless steel insuated lid, narrow opening, vacuum insulated boy and copper plated inner wall help retain the internal temperature longer.
The copper plated inner wall prevents heat from entering or exiting the bottle by thermal radiation.
Stays hot 12 hours
Stays cold 24 hours
Size: 10" H x 2.5" D
Capacity: 17 oz