Allright, well... I would like to create a shopping cart that is not based on cookies. Is this possible?
I've seen various sites like amazon.com that seem not to use cookies for their shopping carts. How can this be done?

An previous idea was to give each coming customer a unique ID and store their selection inside of a database. I would have no problem storing them in a database, however, how would it be possible to assign such a unique tag to each user? Would storing IP addresses work, since I would only need to store the data as long as the customer is browsing the site.

Maybe then, I could write a cleanup script that deletes expired records?

The reason why I Want to do this is to reach customers that do not use cookies... I noticed a few shopping carts on the internet that do not work just because you have cookies disabled. Is this even worth investigating? or should i just stick with the cookie solution...

Any ideas?