I like this shot as a commercial-art-style photograph. Focus is nice and crisp and the cup being mostly full but the liquid still trailing in is a good choice.
I wish the shot had a more defined and well lit background. Also, I think you could have directed more light on the taps. I find the mug a bit too bright. Good idea that could have been better executed with a little more thought.
You work at a Coffee shop? Nice composition. I think a higher shutter speed would have 'frozen' the liquid better, but you might not have had enough light.