I love the idea of personal cup adaptor, but I have to admit it has been a bit challenging figuring out the best method for blending. Because the contents are sealed in the container, there is no way to mix things (like if all the frozen stuff gets stuck around the blender, and none of the liquid can get through to be mixed!). I usually blend the "soft" items & then open the cup to add ice or frozen berries, etc.  and put it back on for a final blend. Also...Vitamix is not a quiet machine, but when you add in the hollow plastic adaptor, the sound is even more amplified! Don't make smoothies before everyone in the house is awake!