Real Leather bag. Has slot for 2 stones and could fit 7-12 knives in the bag. Plus side pocket inside the bag could be able to keep your Key ring and phone inside the bag too.
I got the design from the bag that almost every Japanese chef use in Japan.
The bag could be used in many proposes. On your day off, you can bring all the knives off and use it as a Gym bag with no problem.