>>13728
>It'd probably be easier (and cheaper)
Sorry, I'm re-reading this and I have no idea why I said that. It wouldn't be easier and cheaper, I meant to say it'd be a lot more effective.
An explosive in a plastic bottle is just going to make a loud flash and bang. You'll probably be badly burned, permanently deafened, probably blinded, but not likely dead. An explosive in a stronger container kind of…'focuses' the explosion? If you get what I mean? Plus as >>13674 said, metal containers will produce shrapnel.
I'm going to bed.