Pink Stuff Theory – also known as (Pink Sh*t Theory) is simply the theory dependent on the usability and (friendliness?) of the color of the “Lyft” logo and brand. It involves having pink doodads in your car that contribute to the Lyft brand while hopefully also coinciding/boosting your own personal brand.
For instance: I drive with a pink air freshener, pink steering wheel cover, and I also wear a pink brimmed Arizona Diamondbacks Baseball Cap because it totally matches my car’s interior and exterior. Here is a photo of a couple pink things that I have in my car:

Another thing you can have that is a tremendous, “no-brainer,” obvious idea (which is funny because I don’t actually have them right now because they broke and I should without question get some immediately…) is pink phone chargers…

Again, the idea is that the pink doodads simply make your passengers feel safe. It’s probably a subconscious thing that represents the Lyft’ brands awareness. Especially at night time, though.
Would you rather get in a car that is dark and spooky (Uber) or a car with a pink, glowing, glow-in-the-dark phone charger-cord? — Keep it simple stupid.
-Chris
*The Soda is not Pink, but it’s good to drink if you are on a Diet.