HIGH QUALITY: The bottle consists of stainless steel which provides a robust build for any occasion whether it be hiking, cycling, camping, gym or just to the office. Its special design along with its material is a testament to its durability.SAFETY: The bottle and cap are made from BPA free materials and food grade steel. Its free of toxins and safe for you to use and drink from.Single layer wall stainless steel water bottle,no heat preservation function, be careful when adding hot water. LEAK PROOF: Specially designed insulated stainless steel cap is leak proof and has a heavy duty thread to help it stay firmly attached.It?s high quality silicone ring ensures no leaks no matter tipped over or shake it.