This bottles makes staying hydrated and living a healthier lifestyles more appealing. The double walled, vaccum insulated body is made of 18/8 stainless steel which insulates cold drinks for up to 24 hours and hot drinks up to 6 hours. The perfect seal technology ensures that the lid is leak proof and will not fail. Perfect for water, smoothies or any other hot or cold refreshements you like. This product is dishwasher safe and BPA free for peace of mind.