Another time: passing object between controllers

[Tobia]

Hello,
i have 2 controller:

@Controller
@SessionAttributes("list")
public class FirstController {}

@Controller
@SessionAttributes("list")
public class SecondController {}

There is any way to let they share the same object attribute "list" as session attribute?
Now I have to call the httpRequest and put it in session, is this the only way?

Thank you.