Hi Adriana!
Thanks a lot for leaving your review here on the items you tried.
For this one, you note it did not mix too well. As the Shakes are based on oats, there will always be a little grain in the texture of the prepared shake, but it should all mix and separate with the Shaker. Using milk instead of water is an option, but it would normally not make a difference in the texture, of course depending on the milk used.
As you have not yet been in touch with us through the Live Chat or love@jimmyjoy.com, I would like to invite you to do so so we can check the options within our 30-day money back guarantee with you.
Thanks in advance <3