Reddit mentions of 38mm Poly Seal Screw Caps (fits most 1/2 & 1 gallon jugs) [Bag of 12]

https://smile.amazon.com/gp/product/B0064OFP88/

These fit on all the carboy's that I've bought.

You can get replacement tops for the GT bottles. They are not too expensive at Amazon.

These are the ones I originally found but i live in Canada and didnt want to deal with cross border shipping on a little mom an pop shop, so I found basically the same thing on amazon

Yeast dies at what? 140° - 145°F? I can make a sous vide water bath with a circulator at about 150°F+ to pasteurize in for about an hour. The type of caps I have for my 1 Gallon Carboys are 38mm Poly Seal Screw Caps. No idea if they would be strong enough for the pressure though.

Mason jars are made to withstand vacuum, not internal pressure. so you're more likely to have an explosion with those than a bottle made to have internal pressure. The Grolsh style beer bottles work great. I also like using 1/2 gallon growlers (get the ploy caps).

Like these?
https://www.amazon.com/38mm-Poly-Seal-Screw-gallon/dp/B0064OFP88/ref=asc_df_B0064OFP88/

I am as well, Old Gt Bottles with a cap like this(cheaper at your local homebrew store) Have been working. however I use(and recommend because one growler takes up less space then 3 or so gt bottles) a Big growler with this cap for 2F and then strain into gt bottles that go straight to the fridge.

I switched out the regular growler tops for these

38mm Poly Seal Screw Caps (fits most 1/2 & 1 gallon jugs) [Bag of 12] https://www.amazon.com/dp/B0064OFP88/ref=cm_sw_r_cp_apa_dnBDyb93PHGC3

Work awesome and fit any 64 oz growler I've tried them on.