This is something you would see in a tv show on Disney.

Maybe he spills often and wants to avoid noticable stains. 

To be fair that Fiji water is more an accessory than a drink so it make sense to match it as you would do with any other garments.

Which do you think is chosen first? Surely it's the outfit? Or do you shop in the store with a list of clothing colors and only by matching flavors? Maybe taste test and then only buy that color of clothing?

I sometime do that with my lunch. I choose my veggie to match my cloth. The meals are still simple and cheap but so much fun to eat!