Built with versatility in mind, this bottle has a high-flow wide diameter opening, good for ice cubes, as well as a convenient 25mm small sip cap for quick and easy access. The double walled vacuum insulated construction prevents condensation collecting on the outside of the bottle while keeping drinks hot for 24 hours and cold for 12 hours. Made from high quality 18/8 stainless steel its super durable, 100% food grade, odourless and BPA-free.