Jewellery, Cutlery and Glass make up the unholy trinity of really difficult things to photograph, and I have always avoided them when they've come up in the product photography requests which I get from time to time. These bottle shots, however, were a small part of a wider lifestyle series, much more up my street.
This kind of work is first and foremost science, requiring precision, patience, some logic, common sense and attention to detail. None of which are my strong points. Glass is mainly about lighting - specifically, not lighting the glass - and while the physics of light is quite simple in theory, it's quite the infuriating opposite in practice. With this kind of work, you really have to know what you're doing and understand the approach and its principles. But with a lot of reading up, watching YouTube tutorials and practising beforehand and, later, work in PS, I managed to do a reasonable job on these.
I'd be remiss if I didn't point out that while these are decent product photographs, they are probably dreadful Product Photographs (and I'm ok with that).