Yeah, try heating the area where you want the whole with some type of flame for at least 60 seconds, then take any sharp but round object (corkscrew, ice pick, etc.) And pretend that the prego jar is someone you are trying to kill, then stab the shit out of it, in one good swift movement on the heated area. (Make sure you have good Aim!) this should create a whole without shattering the entire bottle. I actually do this to most of my bongs and other peices so I have an easier way to collect the resin inside!