The 27 oz. Klean KanteenÂ™ Classic w/sport cap 2.0 is perfect for your on-the-go life. Whether you're trying to juggle a full day of classes or work, the kids' extracurricular 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. BPA free. Weight: 8 oz.