Zach, I would say try a glass blower...as these types of bottles need to be made to certain specifics. There is this Marketed DVD
...but it is a bit expensive. It also sounds like you might have to spend more money on the proper materials to make them yourself. You really have to ask yourself...will I really use this? After all, it really is just a stunt. I suppose with the proper scripting it could be made into a magical piece. Cost of empty bottles, plus cost of materials over a lifetime of magic...for really little gain...I'd suggest holding onto your hard earned money.