Stopper for pyrex carboy??

**EDIT: Nevermind. I soaked the stopper in hot water and I think I got it to hold.

I was given a 5.5 gallon pyrex carboy-looking-thing from a friend. It looks just like this:


I measured the opening and I thought a #11.5 stopper would work. However, the stopper won't stay in place no matter what I do. I've washed all of the star san off both the mouth of the carboy and the stopper and dried both. The stopper still pops out after I push it down.

Out of frustration, I tried a #12, which was too big to fit.

I also tried one of those "universal" stoppers (ie- cup-shaped) that was sized for a demijohn.... Too small.

Does anybody have one of these and know what will work for a stopper???

 

Cool!!!!!!!!!!!

 

I know you said... nevermind.... but there is a larger style universal stopper that is used with Better Bottles which you might want to try.

 

Hey, I just got three of those bad boys for free at work the other week. I was just planning on using tin foil, as I will only use them as secondary. That lip at the top makes carrying these things a breeze.

 

You could also try putting some petroleum jelly on the stopper, it's used normally in labs with a very thin film on the ground glass surfaces to create a seal.

 

Those are awesome! If they are borosilicate glass they'll be a lot tougher than normal glass carboys.

 

Oh FREAKIN' great! Now we are going to start seeing debate threads on which is better, "regular" glass carboys or borosilicate glass!

 

It's ok if the stopper doesn't fit. I'll trade you for a carboy that it does fit

 

If those were commercially available....

Borosilicate is awesome stuff, you can go from flame to ice-water without cracking them, they are harder so they are less likely to break.

 

http://vwrlabshop.com/kimax-brand-heavy-duty-solution-bottles/p/0006891/

It looks like they aren't cheap, either.

Quoted from their site "Necks are tooled for a uniform fit with a #12 rubber stopper ".

 

whew! I think I'd buy a conical first