There's No Umbrella in My Glass

Never Enough Time has added a photo to the pool:

Re-shoot of a glass using methods explained in the book 'Light: Science and Magic'.

Strobist Info:
Yongnuo YN565 @ 1/128 power positioned underneath diffused with reflector to light the base.
Yongnuo YN565 @ 1/32 power positioned behind in a softbox, the centre of which is masked off.

The set-up is available here: Dark Field Lighting Setup

EXIF:
Camera Canon EOS 7D
Exposure 0.004 sec (1/250)
Aperture f/8.0
Focal Length 106 mm
ISO Speed 200