The beer bottles are sitting on a sheet of glass on top of an open ended cardboard box. In the bottom of the box is an Elinchrom D-Lite 4 flash head pointing straight up. On either side of the bottles are two SB-28's in large soft boxes pushed up close to the edge of the bottles. Both are set to 1/2 power (I think). All the flashes are fired by PW's. The background is seamless black paper and there is a length of black velvet draped on the inside back wall of the cardboard box.
I learnt my lesson from the last time I tried this setup and polished everything first to remove as much dust as possible, however I still had to clean up the glass surface quite a bit in Lightroom. I also touched out the back edge of the glass.
Picture here (although not of this actual shot): Beer Picture
Many thanks to Udi Tirosh for publishing this.
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