Material:Both inside and outside are food grade 18/8 304 stainless steel
Vacuum Insulated - Our thermos vacuum flask is double-walled and vacuum insulated which keeps drinks hot for 12h, cold for 6h. And it will never sweat or be too hot to touch.Lower quality bottles sweat inside your bag and on your desk wreaking havoc.
Just The Right Size: Our thermos vacuum flask can be met your everyday hydration needs, all while keeping it piping hot or ice cold and fitting comfortable and conveniently in your hand or your vehicles'cup holders. The 12 oz size fits under most single cup coffee brewing systems, and the 18 oz and 20 oz coffee flasks are the same size as most standard to-go coffee sizes, so you don't have to use another paper cup.
64 oz vacuum insulated water bottle , 18/8 stainless steel double wall thermos vacuum flask for picnic