Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Excellent for shakes!

I was hesitant to purchase it at first, but for the price you simply cannot go wrong. I needed a tall cup that I can use daily for mixing my protein shakes, as well as my fruit shakes and this cup fits the bill. The seam for the bottom cap can be seen from the outside, but inside is well polished and it looks as if the entire thing is one piece. In short, I recommend it.