how to save the items that i add in a "shopping cart"

how to save the items that i add in a "shopping cart"

I get the items via .droppable but i don`t know how to make that when i refresh it will keep my products in the list.

And second , to make a submit button that will emial me all the text that i added in the <li class="placeholder">Add your items here</li>

http://www.roxymob.ro/pagini/jquery.html