Syntax - researching for the blue drink that will be sold

I decided that I wanted a blue drink to be sold at the gig, each gig would have the different colours that support that specific song.

I found a few images I can manipulate

At the moment this seems the best one to work with, seeing it's in a plastic cup, more realistic to what would be used at a gig. 

Like how this one has an obvious gradient, but maybe not quite the gradient I would like. I prefer when the whole drink is blue with a slight gradient.