I've used this with good results.
You need a large box with a fitted lid - I used an empty Staples printer paper box but a cardboard file box will work as well.
place the lid on the box and poke a hole in the top. Thread the pomander ribbon through the hole from the bottom and slide it over a cardboard tube (bathroom tissue or paper towel tubes are great for this. Tape the tubes at each end to the top of the box, then gently lower the pomander into the box, making sure that it does not touch the bottom or sides. Tighten the lid and you are good to go. Each box will hold 2 large pomanders or 3 small, depending on size. The nice thing about this packaging is that it can be stacked and can survive quite a bit of knocking around.
Emily