Question: What was the significance with the Sprite?

Near the end, Matt Dillon and the Wendy character each chug down a can of Sprite. Was there any significance to this act or were they just thirsty? Did they want to leave their fingerprints behind? This is the only part I had trouble with. The rest of the movie was great. I really enjoyed it.


“All of these moments will be lost in time...like tears in the rain” Blade Runner