Our most popular size, 27 ounces is perfect for your on-the-go life. Whether youÆre trying to juggle a full day of classes; or work, the kidsÆ extracurricular schedules, and a healthy dinner; or a trip to dog park between your bike ride and happy hour out with friends, just one or two fill-ups will help you stay hydrated and happy all day. Like every Klean Kanteen, itÆs made of 100% recyclable, high-quality, food grade stainless steel so it doesnÆt need a special lining like some other metal bottles. ItÆs completely BPA-free and wonÆt leach chemicals, toxins, or funky flavors into your water, juice, smoothie, or drink of choice. Plus it weighs only 8 oz. and is incredibly durable, so you can reuse it for years. The large-mouth design allows you to pour in big stuff like ice cubes, and makes cleaning your Klean Kanteen as simple as washing it with mild soap and warm water or throwing it in the dishwasher. Plus the slim design fits into just about any cup holder or Kanteen« bike cage. Day after day, year after year, your Klean Kanteen will keep your drinks fresh, crisp and clean tasting. Green Moss.