For the Future MVP: 12oz vacuum insulated stainless steel keeps drinks cold 24 hours. Built to Take a Hit: Silicone sleeve provides impact protection and a no-slip grip. 18/8 stainless steel won’t rust. Totally Leak-Proof: One touch push button lid with lock is completely leak-proof. Echo’s lid features an FDA food grade silicone straw for comfortable hydration. Stay Healthy, Stay Hydrated: Hand wash bottle recommended. Lid is dishwasher safe. All parts are BPA free. Got You Covered: ZULU’s Lifetime Guarantee protects purchases from authorized retailers.