Ahh, this "Black Ice" from Smirnoff tastes really good!
Anyway, for this shot, a flash was positioned at left (about 8 feet at 1/8 power) with a reflector at right. Water was poured from the top. Radial gradient was added in Photoshop.
Product Shoot Manual settings:
Exposure: 1/250 sec
Focal Length: 125 mm
ISO Speed: 200
If you wish to license some of my photos, please contact me here.