Just found out that if you scan the Q.R. Code on the bottom of the CMFs boxes
using the brick search app than it will tell you which one is inside!
I can confirm this; I just went 5 for 5 at a Barnes & Noble. But unfortunately
there is a catch: it only works if the box has a “large” QR code (see picture:
top box is a large code). Hopefully this trend continues. I remember that the
first two CMF series had unique bar codes back in 2010 before code readers were
ubiquitous, but LEGO quickly put a stop to that.