1.BPA-free 2.No-toxic 3.Eco-friendly 4.Passe FDA,LFGB,Propo 65,Lead Test etc. vacuum flask This kind of vacuum flask are with two covers.material:18/4 or 18/8 stainless steel (as client's request).Double walls stainless steel vacuum flasks insulated for maximum temperate retention, can keep hot or cold for 24 hours.Lightweight ,unbreakable, streamlined to fit into any ruchsack, briefcase.Hand ...