... steel and high vacuum make it insulated from outside,can keep warm or cold for about 24hours.3.Wide mouth design can ... ,mainly such as stainless steel vacuum flask, coffee pot, mug, auto mug, sports bottle,etc.Our products have passed SGS,LFGB test ... in the near future and keep a long-term cooperation. BPA free stainless steel vacuum insulated travel tea pot keep warm for 24h