Manufacturer in Invoice Detail

[gruvhip]

In my store, I have a variety of similar products but from different manufacturers. For example, I have 10 different oranges juice products from 10 different manufacturer. In the cart and in the invoice it just says orange juice.  So how is a buyer to know which he has purchased?  I can't just put the manufacturer name in the product name. If I can at least call up the the purchased item's manufacturer 1d on the invoice I can create a loop to display the name.

$this->product->virtuemart_manufacturer_id
or
$this->product->mf_name

Does not work

Any help would be appreciated!!

Thank You