... steel PS material. 2 vaccum structure. 3.customized logo is welcome 4. ISO/FDA/SGS etc. 5. Welcome OEM. 1) Double wall with handle ... ,mainly such as stainless steel vacuum flask, coffee pot, mug, auto mug, sports bottle,etc.Our products have passed SGS,LFGB test ... the near future and keep a long-term cooperation!! 350ml double wall PS plastic tumbler