Saving Values using an alternative to Sessions

I am saving a value ID using sessions on this feedback Form, but at times, if the visitor takes too long to type a a feedback, the session times out and the user received an error message.

Please note, my session is set to 20 mn on the application.cfm, I do not want to increase its value because of other issues that might arise.

I'd like to use an alternative way to sessions to save the Value ID - I am sure there is a way, but do not know what it is.

Here is what I am using now:
Any input would be appreciated.

Thank you.

-AJ

re: Saving Values using an alternative to Sessions

How about generating this unique ID after submission?