We ordered the cup adapter to make personal smoothies instead of using our blender. The quality is top notch like you would expect from Vitamix. We love the cup quality as well as function. The seal is top notch as well as the locking spout. Overall very pleased with all of it. The only reason I wouldn't give it a perfect score is how loud it is while blending. I guess there is nothing they could do about that? The cool thing is it acts like a Ninga type personal smoothie setup with quality that is over the top that we are used to from Vitamix.