The new version of the original Blender Bottle protein shaker comes with some upgrades. Elements from the first classic bottle including the BlenderBall whisk, leak-proof seal, and the carry loop are paired with the improved modern design, a rounded base for smoother protein shake mixing, measured markings, and a SpoutGuard for a germ-free drinking experience. For the fitness beginner that tentatively uses the treadmill to the weightlift fanatic that kind of scares us, the Classic Version two is suitable for both and anyone in between.