Where to store these values?

[Hussein Baghdadi]

Hi.
In my all views pages, I want to render a list of the last five viewed items no matter if the user is guest or logged in user (you know, like Amazon).
Where to store those five items (I'm thinking to store title and an id for each item)?
They could be stored in a session context but it looks to me overkill (may be the visitor will view two items and then closes his browser, why to wait for session time out)?
Do you suggest any technique?
Thanks for help and time.