I started detailing how I processed the goumi’s here
In short, I used an oxo food mill and passed them through the medium and then the smallest plate that came with it.
I was left with what I thought was juice and then froze it, some in these tiny ice cube trays that made ice cubes 0.4 inches square and the rest in a corningware dish. unfortunately the “juice” was essentially just a really fine paste so getting them out of the solid plastic trays was a pain in the a$$ and after trying once or twice I just left them in the freezer for months without use.
Just recently we were cleaning out the freezer and instead of trashing my processed goumi paste I decided to try and make some juice with it. I mixed it with water and put it in a 64oz glass milk container, but like an idiot, I thought it would blend seamlessly into the water just with a few shakes.
within hours the goumi berry fine pulp sank to the bottom of the jar and looked like this

Definitely not the most palatable looking drink.
I was still determined to make juice with it so I searched for an emulsifier/binder and picked up some Xanthan gum.
I weighted the water and pulp mixture on my scale at roughly 1900 grams and placed it in my blender. I blended it first so it would be mixed in as much as possible prior to adding the Xanthan gum. I then added ~1 gram of Xanthan gum and sure enough it thickened and bound the pulp to the water but while not gloopy, the consistency was a bit too thick, and I should have added less (my scale’s lowest measured weight was 1 gram). I then blended it a few more times and added some sugar, approx. 4.5 tablespoons, so it is just lightly sweet
This is what it looks like after blending and sitting in my fridge for a few hours

While some particles are still visible, it definitely has a more homogenous look.
The original intent of freezing the pulp was to use it in place of lime juice in a margarita, and maybe now as a liquid in the fridge that is easily accessible, I might actually give that a try now…if my kids don’t drink it all as a juice!