1.Keep Your Drinking Hot & Cold All Day: Water bottles are double-walled and vacuum insulated. Our metal water bottles have been proved to provide the best insulation for your drinks, whether cold cola or hot coffee. Hot drinks last up to 12 hours, and cold drinks up to 24 hours. 2.NO LEAKS: Travel water mug comes with a leak proof, insulated, BPA free cap flip-open lids are designed to release and hold, then flip open. This 2-step lid release allows condensation on the lid gasket to fall back into the mug instead of splattering. 3.Safer, Lighter Quality: Travel water bottles are made from high quality food grade 10/18 stainless steel that are safer and lighter than using 8/18 ones or plastic or glass water bottles! The special manufacturing technique was used to make the body ultra-light weight and compact. 4.Healthy life: Protecting the earth is the duty to us, our bottle not only made eco-friendly material but bring you a healthy life style.