I started on this with the plan to do some abstract light painting. I had seen this done with a wine glass. I decided to do with a beer glass. With beer.
My setup for this started with an empty glass. I did a few practise shots, set focus, etc. The glass is sitting on glass from a picture frame. The background is two black towels. In some shots I noticed I could see my hand so I put on a black glove.
While doing shots I decided on one to just keep the flashlight behind the glass. I liked it. I tried a bunch and this is the one I picked to work on.
Once again I left Lightroom. I used Elements to add an overlay layer and the brush tool to paint the background black. There was some light spillage so I was cleaning it up.
The glass itself was not done with any layers. I adjusted the clarity and shadows and highlights a bit.
The beer is Kilkenny Irish Cream Ale. I drank it after I was done.