DOF and macro

just playing around with DOF and my 100mm macro lens (or i should say...LACK of DOF...:p).
in the pic below, i was going for an "action" shot of pulling a shot of espresso.

setup: tripod w/ remote release
lens: 100mm f/2.8 macro
iso: 200
ap: f/5.6
flash: on
shutter: 1/200

the goal was to have everything in focus from the streams forward, but obviously only the front of the shot glass is...the espresso streams are way beyond the DOF.

the DOF calculator gives:

Subject distance 10 in
Depth of field
Near limit 9.98 in
Far limit 10 in
Total 0.03 in
In front of subject 0.02 in (50%)
Behind subject 0.02 in (50%)

is there any way to accomplish this other than stacking...or is this just the nature of the macro lens?

smaller aperture for starters. and distance helps so if u can go a bit farther back might help (u can crop the picture later to give same size cup).

Yep, you're on a tripod, so as long as you don't need to freeze the water you can close your aperture down to around f/18 or so and use a slow shutter speed. If you need to freeze the water, in order to close down the aperture, you'd probably need a flash.

Check this out, it could be the answer you're looking for:

Helicon Focus