1)duoble wall stainless steel and make vacuum 2)the body have 2 design,one of slippery surface,one of scow screw thread onbody,

1)duoble wall stainless steel  and make vacuum

2)the body have 2 design,one of slippery surface,one of scow screw thread onbody

3)it is can spray-paint all  kinds of you request and silkscreen.

vacuum flask