M&M sponsored them back in about 97 or 98 for a one off thing with the sky blue jumper, 97 I'll go with, I was actually reading something the other week about that, but the light blue came out in 2011.
Rompers answer is correct. the Carlton F.C. did a one off sky blue jumper as a promotion for when blue m&m's first came out. reckon 98 or 99 would be about right. cheers.
I remember them being on the footy show. And I have a feeling that M and Ms were the sponsor? And I'm gonna guess that it was about 200...4?