Add in some difuse grey backgound and crop out the bubbles from one cup to place in this one.
step 3 of 4
Add in some more bubble by the wrist, cropping them from the other surface bubbles, flipping and duplcating them. Using 'multiply' filter to get a better colour in them.
Also, place some droplets on the hand, using black dots, on 'screen', with various drop shadows and and inner/outer glows. Faintly draw in the fingers shadows on the cup's shadow.
step 4 of 4
Add in the lettering, plus the steam. Make the steam with a soft brush drawing some lines, then smudging them back and forth, and playing on different layers and with transparency.