Klean kanteen classic 800ml water bottle with loop cap description our most popular size the 27oz kanteen classic is perfect for your on the go life whether you are trying to juggle a full day of classes or work or a trip to the dog park between your workout and happy hour just one or two fill ups will help you stay hydrated and happy all day the 27oz is available with the sport cap 30 featuring a soft silicone spout 25 percent higher flow rate and chirp free hydration easy drinkin