Looking for info about Coke plastic cans from 1985

[dshvo]

I am trying to find information about the Coke plastic cans that were test marketed in 1985.  My client was sued by someone that got a patent on plastic cans with an invention date in 2010.  Given that Coke used such cans in 1985, the patent should be invalid.  But I am trying to find someone who knows that the cans were actually marketed in 1985.  I have seen examples of such cans on this site, so I am hoping someone can confirm, or knows someone who can confirm, that the cans were test marketed in 1985.

Thanks!