It took me quite a while to come up with something to illustrate for this project. I wanted to do something familiar and iconic, but Coke bottles have been done before! I decided Listerine was a good choice because it's blue and shiny and recognizable.
I was kind of scared to do a gouache pick out illustration because I'd never successfully done one before - my gouache was too cheap - so I started two Listerine illustrations: one on illustration board with the gouache, and one on watercolor paper, still with gouache, but used like watercolors. I worked on both until the watercolor one won out. Here it is.