The question that people ask me when I lift my hot-pink KOR ONE water bottle to my mouth isn’t, “Where did you get that?” It’s, “What is that?” I don’t blame them, really. There’s ...

Delta costs $19.95 for a 500-milliliter bottle and $22.95 for a 750-milliliter bottle. KOR One is $29.95. The lower price point means that KOR can now compete with mainstream reusable-water bottle ...