It's not a water bottle, it's an Anti-Bottle. Didn't quite grasp that, did you? It means reusable, foldable, attachable, freezable, sustainable convenience, all in one easy to grip, streamline bottle. It's a flexible product made specifically with active lifestyles in mind. The Anti-Bottle defies all the laws of what a water bottle "should be". Unlike traditional rigid bottles, it lays flat when empty, and has the ability to be folded and stored where other bottles cannot. It's also BPA-free, and super easy to wash. Vapur's Eclipse series bottles have a unique matte finish that will patina beautifully over time.