"Oh no, my bike is black and I can't find any black water bottles. What should I do? Is blue acceptable?"
Use clear bottles and licorice flavored sports drink. It is the only way.

"gatorade is not a sports drink. it is meant for fat teenagers who think drinking it makes them look like cool athletes."
And what would be the proper sports drink for us fat old men that want to look like cool athletes? Or else like bicyclists? (Actually, I really would like to know the drink of choice, as I wind up using Gatorade due to availability.)