It works great. The taste is great and the delivery of it was quick. The only problem is that if you use bottle water you will need a funnel for all the mix to go inside it. I gave some to my mother and she demands it every night to help her sleep.
I love this cup so much. I use it to drink all my energy drinks.
This is the cup that I take with me to work. The waifu is very modest compared to the other ones I have.