In Parshas Vayigash Yosef sends his brothers back to Eretz Yisroel with food, silver, and clothing. He asks them to tell Yaakov that he is still alive and to bring Yaakov down to see him.
We put candy fruit (for food) and silver chocolates (for the silver) in bowels to represent this.
ויגש מה:כב-כג
Vayigash 45:22-23