The elliptical shape of the KOR One bottle tapers toward the top to create a sophisticated and iconic product. Available in 7 colors. Inside the lid of each KOR One bottle is a KOR Stone™ - a tiny reminder of what inspires you. Even before you discover the KOR™ Stone, you'll notice the oval shape and comfortable handle and exceptional styling. This is no mere water bottle; it's a hydration vessel. Custom printed KOR Stone™ information available here . A Kor Stone™ is a disc-shaped FiberStone token with a message or word designed to inspire and empower you. KOR Stones™ are made of a tree-free, waterproof FiberStone® paper without water waste or chemical bleaching.