Stainless Steel Outer And Inner. 3-In-1 Technology. Fits Most 16 Oz. Cans. A Freezable Adapter To Convert Can Cooler For 12 Oz. Cans. Includes Screw On BevLock™ Tritan™ Leakproof Lid To Convert Into A 16 Oz. Pint Tumbler. BevGuard™ Insulation For Keeping Your Drink Ice-Cold. Push-Lock™ Technology To Easily Insert And Remove Cans Without Unscrewing The Gasket. Cup Holder Friendly. Meets FDA Requirements. BPA Free. Hand Wash Recommended .