Create new layer. Click Edit > Fill. Choose Use: Color and pick #765E36.

Now select eraser tool and choose hard edge brush, harness: 95%. Use [ and ] to increase and decrease brush size. Paint on the brown color to draw holes for the bubble.

To give a 3D look, we just need to paint white inside the holes for the highlights.

Another highlight is needed near those bubbles. Create selection inside the coffee using lasso tool. Paint it with white using soft brush.

We're done with the water. Using rounded rectangle tool draw the cup's handle. Make sure you put the layer under the cup. Add Inner Shadow, Outer Glow, and Bevel and Emboss to give it a three-dimensional look.



Duplicate the cup's handle. Put it under the original handle. Use same layer style but for this one raise Inner shadow to make it darker. This will add a bit perspective to the cup.

Now, select cup handle's tip and fill it with white. This small adjustment adds more curvature to it and make it more realistic.
