Quote from Enosphorous
I was thinking about different tiers of bottles, like a 'Holy Bottle' and a 'Cursed Bottle' that are obtainable in special ways. I know that your process of thinking comes directly from logic. However, ghasts are not real, and if they were, I doubt you'd be able to catch them in a bottle. The 'Bottled Ghast' is making an allusion to my favorite childhod game, The Legend of Zelda: Ocarina of Time. In the game, you can capture spirits called 'Poes' in empty bottles.
I figured something like that would fit the semi-realistic environment of Minecraft. I probably won't be changing the way ghasts are captured (aside from possible tweaking), but I will definitely have a couple different tiers of bottle.
Thanks for the feedback!
You could always implement a "bug-catching net" (homage LttP)? Because to be honest, I still can't catch ghasts in a bottle; it might just be the combination of mods I'm using (probably also the reason I can stack bottles) or the eternal gaming issue that I'm using a mac.