From a chemists point of view I would be careful using reactors in the form of bottles, erlenmeyers, etc.
Especially on the size that you are using. I can imagine that if you have a gas (NoX for instance) forming during the reaction,
depending on the rate of gas build up, it can not dissipate fast enough through the small neck and the whole thing 'explodes'.
Maybe I'm a bit to careful with these things, but just wanted to make this remark.
Johan