Question regarding storage, bringing phones to work/school?

Hello I was wondering what is the best option to bring your phones to school/work. I can't always have my checkpoints phones out. Usually have them in my backpack but i want to organize them a bit more professionally and was wondering for those that do. Did you guys buy a carrying case for all your phones? And can you recommend one? Im getting a charger to put them in and was planning on using a lunch bag to use.

I use one close to how this looks http://ift.tt/1oi9oQn

would this be an okay option or not?