I was wondering about that as well and found an article [1] that has pictures of an opened packet as well as after juicing [2]. To me it looks like the produce is chopped very fine, maybe a little like produce that has gone through a blender for a few seconds.

[1] http://www.businessinsider.sg/juicer-juicer-product-review-2...

[2] https://static-ssl.businessinsider.com/image/5710e74c9105842...