Reinventing a wheel
Well there are lot of glass images on DT, and big hunk of them are 'glass with whisky' images.
You would say that it's very well covered topic, but every topic can be rediscovered.
Here's my picture, after 1 day it already has 38 visits.
To me it just means that every topic can be reinvented, just go creative and try to capture something unique.
Photo credits: Stefan Tyllo.