How to add product with return able Case.
How can I manage a product with empty case. Explanation: I have a product like as mineral water with cane. Price of Bottle is 500, and price of water in this bottle is 100. Bottle is returne able. I mean that client deposit 500 for security for that bottle and pay extra 100 for the price of water. When he return the bottle he will get back his 500 rupees. How can I manage this product.