This Hydration tumbler is designed to make staying hydrated and maintaining a healthy lifestyle wherever you go even more appealing. A double walled, vacuum-insulated body is made of 18/8 stainless steel which insulates cold drinks for up to 24 hours and hot for up to 6 hours, keeping them as fresh as any just-purchased option. The double wall also means the exterior will stay a comfortable temperature to hold, while a sturdy Tritan lid easily slides open and closed for one-handed drinking. This striking tumbler is charcoal black with a stunning metallic finish, making it a stylish piece as well as functional. Perfect for taking smoothies, herbal teas or any hot or cold refreshment, this tumbler is ideal for taking with you for a nourishing boost in the car, on the commute or anywhere on the go. The bottle is suitable for a standard size cup holder and is BPA free for peace of mind. Capacity: 565ml/20 fluid-ounce.