Heat retention: 185˚f at 1 hr./ 156˚f at 6 hrs.; cold retention: 48˚f at 6 hrs. Tight fitted flip-open lid keeps beverages hotter or colder, featuring a safety lock to prevent the lid from opening accidentally Easy-to-clean nonstick Coated interior Air vent on the mouthpiece allows for smooth Beverage flow without gushing or overflowing Made of BPA-free plastic and stainless steel