Question regarding "package type" as an extension of product

Hi everyone,

I am building an eCommerce site that will have individual products named
identical things, eg. "Some Special Beverage".  Some of those products will
be packaged in Cans and some of those will be in Bottles.  I expected to
see a property in Product to describe the packaging type but did not.  Am I
right that it doesn't exist and if I have this need I should extend Product
or use additionalType?  Any information is much appreciated.

Thanks,
F.M.