Made Of Stainless Steel. BevGuard™ Insulation For Keeping Your Drink Cold For 12 Hours And Hot For 3 Hours. Screw-On, BevLock™ Spill Resistant Lid. Holds A Half Bottle Of Wine Or 375 Ml Of Your Favorite Beverage. Non-Slip Base. No Condensation. Meets FDA Requirements. BPA Free. Hand Wash Recommended.