Colored Zips

I was just fumbling with my rollaboard - the sort of carryon luggage one rolls through airports, designed to fit into an airplane's overhead storage. I am now rolling one around at work, since I am carrying my bicycle gear - helmet, jacket, etc. - and I often do not have time to go to my office.

Anyway, I was fumbling with my rollaboard, looking for the pocket into which I had placed my lunch. 6 choices, different sized pockets. I ended up opening them all.

Although size and position of the zipped pocket should be a clue, how about another:

I seem to remember colors very well. If the pockets all had zips of different colors, it might make it easier to remember which pocket you had slipped something into.