title: Custom Product Type -- Hidden Custom Option or Data Field
body: <p>I'm building a custom Magento product type class. When the user adds an item of this product type to their cart, certain data needs to be associated with the item. A custom option would work well for storing this data except for the fact that the info needs to be kept hidden from the user.</p>
  
  <p>I'm thinking that I either need to create some kind of hidden custom option or somehow add another datafield to the product. How would you suggest that I do this?</p>
  
  <p>Thank you,<br>
  Ben</p>