Blender Bottle GoStak Starter 4 Pk and 28oz Sport Mixer Tritan Grip Includes GoStak Starte 4Pk and 28oz Sport Mixer Tritan Grip Stainless steel Blender Ball will mix the ingredients more thoroughly and easily StayOpen flip cap won't close while using 150cc , 100cc, 60cc and 40cc Jars Easy to clean- dishwasher safe