Your browser does not support grid, so will not be supported. Hover over your browser version to see if there is a way to enable potential support. Sorry, I am no longer able to justify working on making the layout work on older devices.
1: Create a new layer, and give the liquid a "juicy feel", by painting it with the regular brush and standing out colors.2: Then use the almost transparent airbrush-like eraser to remove thin parts.