Vacuum insulated water bottle:

These stainless steel water bottles are double-layered and vacuum-sealed with a copper lining to increase thermal insulation and keep the temperature of the beverage raised or lowered. Keep the beverage cold for at least 12 hours or keep it hot for at least 6 hours while leaving the outside of the bottle unaffected by the heat of its contents.

Size: 20.5x7x7 cm
Capacity 350 ml

Material: Inside: 304 stainless steel

               Outside: 201 stainless steel