Pre Mix Protein Shakes?

I work from 6pm to 6am. I am on the V-Diet and cant stand milled flax seeds unless they are blended. My problem is I can not take a blender in to work.

Can I make my shakes around 530 than take them later on? We have our own fridge at work so that wont be a problem. Or should they be made and drank immediatly after?

I will be taking 2-3 shakes a night at work, I can probaly get away with taking only 2.

This should be fine.