This is a beautiful water bottle and what's special about it is that you can insert "stones" (a printed piece made from one of my favorites - stone paper!) within the cap, so a message shows when you open the bottle. It looks a lot like glass but is made from BPA-free Eastman Tritan, has a soft rubber/cushioned base that protects furniture and prevents slips, and has a hygienic spout where the cap protects the spout from outside germs when not in use. The ergonomic handle makes this easy and comfortable to carry around and the spout feels really great on your lips (weird to say but it's true - it's threadless and smooth). Other KOR water bottles are also available - Aura, Delta, Nava (has a built-in filter), Vida.