stainless steel vacuum flask 1.food grade coating,BPA free,double wall 2.various colour and types are available 3.OEM welcome stainless steel vacuum flask ·Material:201,304 stainless steel·Certification:SGS,TUV,FDA·Feature:eco-friendly,durable,BPA-free,extremely resistant,hygienic·Capacity:350ml,500ml·single wall and double wall·Any colour printing and your own logos are available