Whenever I photograph retail products at Graphic Works, I try to standardize my workflow to save me time and our clients money. This may include setting up a single lighting rig that works for each similar object individually. In the case of this group photo, I shot each bottle alone and then created several versions of group photos and single product shots for print and web use.
This technique is often faster and much more versatile than shooting a group photo to begin with. This is because I can modify the spacing or composition "after the fact". Plus, I don't have to worry about nasty reflections of other bottles or complex lighting set-ups. Knowing this in advance can save a lot of headaches in post production.