Eston Premium & Exclusive Double Wall Vacuum Insulated Stainless Steel Thermos Flask 500 ml Bottle (Tea, Milk, Water, Coffee etc) Keeps hot and Cold for 18 to 24 Hours (Tested) | (Straight Black) Color Name:Straight Black   Eston Premium & Exclusive Double wall vacuum insulated Stainless Steel Thermos flask 500 ml bottle (Tea, Milk, Water, Coffee etc) Keeps hot and cold for 18 to 24 Hours (Tested)