At least that's what this is intend to represent.
Now that looking at actual resource images it appears to me these drops have a bit rough texture. However blurring cannot be operated as in a tilt-shift filer in one easy go.
This is already a hell to render -not the thumbnail, but the actual pack:
it contains 50 watercolour-like filters that openclipart cannot generate a thumbnail to.
Why? Because the objects are using a multiply blending mode to the background image.
What a bummer.