Those are better than a lot of product photos made to sell product.
The most important suggestion I can make is to make the shadows softer (with less of a defined edge). You can do that by moving your light source as close as possible to the subject and/or placing diffusion material between the light source and the subject.
The compositions on your website that have less negative space above the subject are more appealing to my eye. Even so, consider cropping to display as little negative space as possible in all of the photos.
This is an example of both soft shadows and less negative space.