For a Portraiture class, the assignment was "Water Portrait". I combined a studio shot using a purple gel (that I turned blue in processing) with a photo of a shadow of a water bottle with sunlight going through it. I got the idea because I noticed the shadow looked like a spine, and since it was "water" that fulfilled my assignment. I combined the two photos in Photoshop.
Canon Rebel T6
Portrait photo: f/5.6 1/6sec 100 ISO 18mm
Water bottle photo: f/11 1/1600sec ISO 200 29mm