stainless steel thermos flask double wall stainless steel vacuum insulation hygienic press button built-in cup Type:thermos stainless steel vacuum flask / thermos flaskItem No:LLZACapacity:350ml/500ml/750ml/1000mlNo printing:Single color printing:Special packing: Feature:1.Double wall stainless steel vacuum insulation for maximum temperature retention,hot or cold for more than 24hours 2. ...