1.Double wall vacuum stainless steel 2.many colors available 3.keep hot or cold at least 24hour... 4.Capacity:350ml-500ml Features1.Material:double wall construction,18/0 or 18/8 stainless steel is available,all according to client's request.2.Double walls stainless steel and high vaccum make it insulated from outside,can keep warm or cold for at least 15hours.3.Soft rubber handle feels more ...