Klean Kanteen's most Trendy size, the 27oz Kanteen Stainless Steel H2O Bottle with Sports Cap is Great for your on-the-go life. If you're trying to juggle a full day of classes or work, the kids' Additionalcurricular schedules, or a trip to dog park between your workout and happy hour, just one or two fill-ups will help you stay hydrated and happy all day.