Material type for Vendors Returnable packaging material

Question

Dear all,
I have a scenario where in i am recieving co2 gas from my vendor against a PO.
He is supplying it with cylinders i want to keep track of the cylinders and afetr using the gas want to return the cylinder to vendor.
Now the doubt arises, under which material type should I create this cylinder.
Doubt 1
I thougt of creating under the material type : LEIH, but this material type also contains the purchasing, accounting, sales view and same time in the config of the material type LEIH, value updating is not ticked, which is making me confuse.
Doubt 2
What I felt is, LEIH should be used for the our owns company returnable packaging material , which will go to the customer , but again for this also, these material should be valuated, since they belongs to our own stock , so why in standard SAP, value updation is not there.
Doubt 3
Keeping above 2 points in mind, what should be material type for vendor's returnable packaging material , where I want only qty tracking.
Regards
Nitin

Answer 1

You can copy LEIH and create your own Materia Type say ZLEI. For this material type you can have only General Plant / Storage Data1 view enabled.
Remember, there are 2 materials here:
1. Gas
2. Returnable packaging (cylinder)
You can receive gas on unit basis if you dont want exact tracking (ie in KG). Use any procurement material type.
When you create the PO only mainitan Gas as the material.
When you do the goods receipt against this PO, Click on RTP button, this will create a new line item, automatically and will suggest movement type 501+M. Here enter the no. of cylinders.
You will be able to track the movement of cylinders.