You know how "Chi" is the only drink in the world that says its name when you open the cap?
What if Coca Cola designed their bottles so they said "COCA COLA" when you opened them?
They'd need is an average level of CO2 compression in the bottle to make sure that the pressure is even throughout their range so that the loudness per bottle would be similar. For added fun for the consumer they could shake the bottle which would cause it to fizz more and then the bottle's "yell," if you will, would be even louder.
They'd also need a lid design that is funneled at the top so that when the air escapes it passes through these channels and makes the sound Coca Cola. I have some schemtatics on these but haven't got access to my scanner at the moment and will upload them as soon as I can.
This would seriously be the best thing since sliced bread!