How do I setup a product "double pack"

10 0 1


I would like to do the following: I have a product which selling in a single quantity would not allow the price to make it profitable for me. So I would like to only sell a double pack, which justify a higher price. So if you set quantity to 1 in the store, it should actually show 2 in quantity when I fulfill the order. Can anybody help me with this? I have tried various apps, but they just allow me to set a minimum order quantity, which is not what I want to do.

Thanks in advance!