If you want to be organized, I would suggest getting on of these.
http://www.amazon.com/dp/B002S0O7W2/?tag=atomicindus08-20
or
http://www.amazon.com/dp/B000Y8Y31K/?tag=atomicindus08-20
I have both sets and the Wiha bit holder set, although taller, has a thinner profile than the Wera.