I have continued to upgrade my Auto Add Cart Module to include Opt out and upgrade options
You will see you get a free glass and if you order two beer kits you will get a free case of bottles. Now the client wanted a way for the end user to opt out so I created a way to opt of the auto add. I also have create an upsell feature which provides the user with an easy way of adding additional related items to their cart. (See attachments)
I do not have an installer for this module at the moment, you can PM if you are interested.