Looking at the first two photos it is easily to see that the focus is too soft, the shadows are underexposed, there is some color noise in the background and the coffee bean shadows from the harsh light are not good.
Your light source gives an odd, unrealistic color tone to the image, and, as Ralph noted, the light is too harsh, creating sharp shadows. Perhaps you could try this series again with more controlled lighting.
I looks like you used incandescent lamps. You might get better results with high efficiency LED or fluorescent lamps which emit cooler light. See below.
To reiterate, the lighting is bad! Don't use incandescent light (or tungsten from a normal light bulb) as they give out a yellow light which is what you have in your pics.
So from a photographic point of view (technical issues), problems with white balance as well!
Read this about adjusting white balance: