Packages work in the same way.
Packages RuneScape gold work in the same way. Using the box in your inventory, use the item you want to send together with the box, then together with the creature to deliver it. You can resend it 5 times befre you get 3 timber planks corresponding to the box you used. Once you use the loaded box together with the animal, a confirmation message will appear on your screen telling you the title...