I remembered this interesting technique I saw quite a few years ago... this was back when I was a teen (I DID say quite a few years ago!). I was a helping my Mum in the kitchen and we were going to make Deem'r Daalna - a Bengali gastronomical delight of Eggs in a spicy sauce. You had to boil the eggs first, so I reached out to get some eggs. Back then, eggs were stored in square plastic cases, that held 12 eggs at a time. So I got the eggs out, balancing them precariously, when I noticed something on each egg. No, not yucky muck - it was actually something printed on the egg shells.
So I set down all but one egg and looked closer. What I saw made me smile and marvel at the idea :-) Printed in light blue, was the name of a local store, followed by a line announcing a Sale with x% off. This store carried every rainbow-colored-dream an Indian woman might wish to drape herself in - the Sari. And the Indian festival season was soon going to grip the whole country - a time when most folks make some fabulous and often annual additions to their wardrobes. So here was this store, delivering it's message - directly to the person it wished to woo - Women. Now don't get all 'equal opportunity' on me - the time I am referring to (and even today, by large) it is the woman who does most of the cooking in Indian kitchens).
My verdict: 5 out of 6 stars
I think this was a brilliant idea - and I wonder why we never saw more of this medium being used? Brilliant, because it was totally unique - up until 2000 (which is one I moved to the US), I never saw any sort of messaging on individual items meant for mass consumption. Also, it zeroed-in on the Target Audience with pin-point accuracy. The timing was perfect, thus compounding the impact of the message by delivering it at a relevant time (the annual Sale to coincide with the festival season). And BEST of all - the medium (the egg shells) are 100% biodegradable! Does not get better than that!
Few reasons why I am withholding the last star on this idea: I have no data on how cost-effective this technique might have been - you have to factor in the risk of breaking the shells while imprinting messages... Also, I have no idea if the dye used was safe for use on eggs - who knows if it permeated thru the shell and contaminated the eggs? Of course, we had no ill-effects from eating the Deem'r Daalna that day, but still... Another thing was the hue of the dye - it was hard to see against the white and did not pop the message right out at you (may be they used the light dye because it was safe to use on eggs??? Don't know).
Overall tho a simple, brilliant idea that will permanently stay in my mind!