When you think of ultimate personal hydration in your every day life what do you expect? Well, the following for certain: * 100% BPA free materials, free of phthalates, other toxins, lead, or anything harmful to the body or earth. * Made from pure food grade light weight but durable 18-8 stainless steel, the purest form of material to house your liquids, hot or cold. * Double vacuum insulated wall construction contributes to hot teas, soup, coffee or other blends being consistently hot for up to 12 hours. And, for cold water, smoothies, soft drinks, or anything you may need very cold, 24 hours of insulated confidence, guaranteed cold, period! * The bottle will not 'sweat', meaning it will not create condensation which may leave a 'ring' of liquid on your expensive burled walnut side table. * Easy to hand wash or clean, NO aftertaste after cleaning.