Photoshop Editing: Photo Fix (Left Most) and Color Isolation (Right most), Original (Middle)

So the primary issue with the 'before' image was the yellow tint from the overhead lights and some color saturation issues. To rectify these I did the following:

1: I lowered the temperature of the photo considerably to initially reduce the majority of the yellow tint.

2: In order to offset the excessive "blue" tint created by the reduction of temperature I adjusted the tint to the right towards magenta until the colors balanced out as close to their ideal natural hues as I could discern.

3: there were still overlaying hints of yellow so I adjusted the exposure to the right and dropped both the contrast and shadows while boosting the highlights. This made the image look more 'crisp' to me.

4: Finally, I decreased the saturation while increasing the vibrance, this I discovered, took care of the last unwanted yellow areas while boosting the colors I wanted to keep. 

For the color isolation I used the adjustment brush and placed the saturation all the way to 0 then painstakingly contoured the mug. I had to adjust the size of the brush a couple times as well as switch to regular saturation several times to fix some areas where I got too hasty.