Shooting from the bottom will make a product to look dramatic. Inevitable perspective distortion can be fixed with tilt-shift lens or in post-production, using various techniques.

Creating a bright spot on a dark background, right behind the glass (clear or semi-transparent), is a “winner” for the most of situations.
When reflection from the product is needed, use a black plexiglass or cover the table with a tiny film of water: it will work much better than a ‘regular” mirror. Mirror is not good because of a double reflection.