How can I save the same form more than once in Django 1.8?

I have a model Product and a corresponding form Product and I need to update the stock with lets say 5 product, so I input the data for the Product and ask how many items of this product I want to store, because all products to save are the same, except for Django default ID, i was thinking of doing something like this in the view:I have a model Product and a corresponding form