When a glass or clear plastic packaging is photographed it will let the background shine through. Also, reflections and color spill from the surrounding area and from the light sources influence the outcome.
The physical photo shoot setup of the object can mitigate some issues but a special effort in post-production can be expected as well.
My goal is to break up the parts of a product shoot into pieces to assemble them later in layers to create composites. That workflow includes thinking about the number and type of photos to be taken during the shoot but also to break up an existing image into pieces and treat areas with Photoshop techniques.