Premium Material Made of food grade 304 stainless steel, strong and durable to use, the cup was polished inside and outside and will not hurt your mouth. Double Wall Vacuum Special double wall design, which can insulate the heat efficiently, suitable for all ages people. Heat and Cold Insulation With the stainless steel double wall vacuum design, our metal drinking cups can insulate the heat and cold efficiently. All occasions Our metal drinking cups are suitable for both adults and children, also it can be used for outdoor camping, tourism, hiking, beaches, picnics, etc. Environmentally friendly Stainless steel drinking cup is not only safer and healthier but also sturdy and reusable, stop using your plastic or glass cups and buy a stainless steel cup now!