The Vita Zojirushi Travel Mug is a stainless steel vacuum mug with Slick Steel finish. It's tight fitted lid keeps beverages hotter or colder than your average travel mug. It's made of BPA-free plastic and and retain 187 DegreeF at 1 hr. / 153 DegreeF at 6 hrs. The stopper disassembles for thorough cleaning and the wide lip accommodates full-size ice cubes.