Vacuum Insulated Stainless Steel - Our Cooper 32 oz Water Bottle is double walled and vacuum insulated, which keeps drinks cold up to 24 hours Travel Ready – A built-in handle enables you to carry it with ease or attach it to a backpack. Our one touch locking flip lid with silicone push button helps ensure that your bottle always stays leak free. Premium Stainless Steel - Protect the environment and your own health by daring the switchover from plastic to stainless. Cooper is produced with 18/8 stainless steel with powder coat finish won't chip or sweat Cleaning Made Easy – Our Lids are easy to disassemble to make cleaning a breeze. If you own another Cooper in a different color, have fun and mix and match the spout! Care instructions: Hand Wash Recommended.