this 16 oz. contigo travel mug is ideal for those who love to explore. its AUTOSEAL® button makes it spill proof, and it features a bpa-free plastic lid and a vacuum-insulated stainless steel body that keeps drinks hot up to 5 hours and cold up to 12 hours. the mug fits most car cup holders and under most single serve brewers. all contigo products are bpa free and have a limited lifetime guarantee.