These travel mugs are 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 insulated 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. The travel mug is suitable for a standard size cup holder to sit comfortably on car journeys and is BPA free for peace of mind. Capacity: 590ml/20fl oz.