Standard Mouth is ideal for sipping, while still accommodating ice cubes. Also, safety is top-of-mind, as the bottles are made out of non-toxic, BPA-free plastics & 18/8 food-grade stainless steel. Meets your everyday hydration needs in one container, all while keeping it piping hot or ice cold and fitting comfortably and conveniently in your hand or your vehicles’ cup holders and bicycle bottle racks. The double-walled, vacuum insulated technology will ensure that your beverage of choice maintains its temperature for many hours to come. Hot drinks up to 6 hours, and cold drinks for up to 24 hours.