Another idea for the runny shake problume...
Add more water, maybe an ice cube or two and a shake packet and swrill in the blender for a min.
Take half and put it away for later
Drink the other half
It makes a very smooth, thick, and crammy shake. I make these when I want a special treat for myself.
The key is only drink half since you mixed two packets. The second half comes back to life rather well with another swirl in the blender.
This is where that Magic Bullet comes in nice an handy with those mugs...