I am kicking my Diet Coke habit (AGAIN) and replacing it with a green smoothie in the morning. I have found a combo that doesn't taste great, but doesn't taste terrible. And, surprisingly, Cece loves it and always drinks with me. I think it's the novelty of the straw, and that it is totally cold with lots of ice. It's packed full of vegetables and flax seed, and I am happy to share. She drank everything that you can see gone out of this cup. I was very impressed!