Only been used a few times!! Black doesn’t photograph well and the material of the bottle in onyx shows prints. But it’s clean 😊😊 the sports lid is perfect for convenience and you don’t have to unscrew the lid every time. Keep drinks cold for 36 hours or hot for 28 hours. Superior performance, a sleek silhouette and an extensive collection of beautiful designs sets S'well apart. Our signature Therma-S’well® Technology is designed to keep beverages colder or hotter, longer than all the rest.