I'm afraid this is just one of those products that must be viewed with some small skepticism for a coupla reasons...
First, despite the large number of folks that have tried them - only a very few have reported any beneficial effect and even of those effects reported, it's been mostly marginal idle improvements so it's possible that it's either a placebo effect or even as simple a thing as an inadvertently repaired intake manifold leak.
The second far more interesting reason is (and please correct me if I'm wrong) to the best of my knowledge - absolutely no major two stroke manufacturer nor racing team of any type uses any sort of "boost bottle" on their engines. Motorcycles, snowmobiles, dirtbikes, quads, outboards, gokarts, etc. - NONE of them have anything at all like this...
I somehow doubt our lil HTs are at the forefront of engine technology & product development
http://motorbicycling.com/f51/boost-bottles-13896.html