Made Of Stainless Steel. Powder Coated Finish. BevGuard™ Insulation To Keep Beverage Cold Or Hot. • Screw-On BevLock™ Tritan™ Plastic Leakproof Lid Seals It Tight To Prevent Spills And A Magnetic Closure To Keep Lid Open While You Sip. Left And Right Hand Friendly. Non-Slip Base. No Metallic Taste. Cup Holder Friendly. Meets FDA Requirements. BPA Free. Dishwasher Safe.