stainless steel vacuum flask gift set: 1,dishwasher safe 2,no rusting weld 3,longtime insulation ... 4,various packaging sty Specificationsstainless steel vacuum flask gift set: 1,dishwasher safe 2,no rusting weld 3,longtime insulation ... body and polished surface· Thickness: 0.4mm· Recommend old fashioned cleaner: white vinegar and baking soda· Certifications: FDA, LMGB, US California ...