People tend to get funny about this subject and Jamie Grant's bottles. The AOA method is quite well known and easily figured out by non magicians, Jamie's is not. I own one of Jamie's bottles, and I've also got my own one that I made using the AOA method; most people will know they are quite different techniques, Jamie's being of exceptional quality, and I mean worth $100 exceptional. I've seen at least a couple of threads go bad on this topic, so I'd thought I'd have my input.
With that being said, I'd highly recommend trying to make your own, its very fun and satisfying, and you don't need AOA either, I'm pretty sure you can find simple instructions for free online.