Yongkang Rixin Metal Products Co., Ltd. is a professional enterprise that produces travel vacuum flask (http://www.cn-vacuumcup.com/product/travel-mug/bmg8502-portable-travel-insulation-pot-vacuum-flask-with-cup.html). Its products include stainless steel vacuum insulated bottles, travel kettles, coffee pots, and other stainless steel vessels. 
China