The premier shaker bottle since 2004 with its leak proof seal and the iconic BlenderBall wire whisk. The adjustable carry loop lets you hold more of what you take to the gym or the office. Measurement marks included up to 20 Oz., 28 Oz. capacity to cup brim. Integrated with the StayOpen flip cap, the adjustable carry loop lets you attach your keys for safekeeping during your workout and gives you carrying options.