Possible copyright question?

I'm going to be working on a new series of drawings for sale. I'll be drawing wine bottles and want to draw them with their original labels. I don't know if this is exactly a copyright issue, but I don't know what else to consider it. The issue is: I won't be endorsed by the companies while producing an image of their brand and putting it up for sale. Could this create an issue in legality of the drawings? Note: I won't be altering the appearance of the product or the label in any way because this series will focus on photorealism.