How do I save extra information about the user in the cookie?

Hi,
I'm using the ASP.NET membership framework in my ASP.NET application. I'd like to save a few extra pieces of information in the cookie so that when I need it, I don't have to go back to the database. I want to save user's email address, full name and time zone.
How do I save this information in the cookie?How do I retrieve it? ...