I would suggest you hire a professional photographer.
Aside from that, posting a photo would be really helpful, so we can see exactly what you are trying to photograph. Highlights are really useful in a photo and oftentimes describe packaging and surface texture, as well as contributing a contrast highpoint. For example, individually wrapped pieces of candy may look more appealing when shot brighter, with highlights topping out any bright colors and with fewer shadows. Also, telling us a little about the product and the photo's end use and final image size/dimensions might be helpful as well. If the photo will run really small then it may be more descriptive to zoom in tightly on the subject and use the copy to describe the container. Is this something that can be photographed outside the container, perhaps next to it? Does the product design, the manufacturer, the layout designer or the copy dictate that it be photographed in the container? Why must it be photographed in the container?
More information would be useful.