Oh, this is an old photo - so it would have been taken in a cheap and cheerful black and white photo tent from eBay, and lit from either side using daylight balanced bulbs. This removes -or at least minimises - any shadows and creates the bright highlights on the glass (which I was a fan of at that time). The rest is just tinkering with the white balance, either in camera or in post-production, to get the crisp white.
These days I usually use a photo table, which is lit from below and behind, in combination with a circular polarising lense to get rid of any glare this might cause. I've found it's the best way to get classy glassy pictures for the most minimal of effort - no shadows, no glare, and more scope for being artistic with your lighting, should the mood take you.
Again, cheap/ish versions of all of the above are available on eBay, and increasingly through online photography shops trying to compete with the auction site. If you do a search of this forum for the terms then there are usually threads explaining what they are, how to use them, and a few tricks members have discovered.
