Do you use protein bars?
 

High protein bars are made to be perfect high protein snacks. They are easy to take to work, school, gym or anywhere you need to be during your busy lifestyle. A good protein bar can contain 22-30 grams of protein, 18-20 grams of carbohydrates and 1-5 grams of fat.

I will from time to time, but I try to stay away because of the sugar.