From what i've read, you mix it the night before, put it in the fridge overnight to get smooth and then consume it throughout the day. So presumably you'd just take a small bottle of it into work for your lunch.
That is correct. I mix up 2 meals worth each night and grab them from the fridge in the morning. One for breakfast immediately and the second for lunch at the office. I do not use the provided pitcher, but rather mix individual servings in these: http://www.amazon.com/gp/product/B00MVMCUK8
This is how I prepare mine at the end of each day before bed. If I know I'm going to be working late, I'll bring the pitcher in with me. Otherwise, I just fill a 28oz blender bottle for lunch and afternoon meals.