A LID FOR ALL YOUR NEEDS Cooper just got better! Choose between two lid options: a soft silicone spout with a locking, leak-proof flip lid to keep the drink surface fully covered during transport, or a wide mouth twist cap perfect for work, workouts, or staying hydrated at home.  The Cooper keeps drinks cold for over 20 hours and is made from 18/8 stainless steel with an ultra-durable powder coat finish that won't chip or rust. Take your water bottle wherever life takes you, thanks to the built in carry handle. Attach it to your backpack, gym bag, or carry it by hand. Our bottle features a secure, leak-proof screw on seal, allowing you to toss it in your bag worry-free. Plus, the 18oz and 22oz sizes fit most car cup holders.