Use a glossy black surface rather than a household mirror. A real mirror can create a double image because of reflections from both the glass and the backing. Black acrylic or glossy laminate/Formica is a better choice for a clean reflected look.

For lighting, the sample appears to use strong background/back lighting placed fairly close to the subjects, which creates the bright glow and noticeable falloff across the row. To keep the front from going completely dark, add a white or silver bounce card in front, or use a diffused front fill light.

That said, images like this are often finished in post-processing. The reflection may be added later rather than photographed directly, especially if you want a very clean result without surface glare. In many cases, shooting a well-lit product on black and then enhancing or creating the reflection in Photoshop is easier and more controllable than trying to do every effect in-camera.

So the practical recipe is: glossy black acrylic surface, controlled back/background light, subtle front fill, and expect to refine the reflection and cleanup in post.