Q: Can I carbonate in a growler with this cap?
A: You can carbonate a growler with this cap however it is not the best to hold carbonation over time. I would recommend the swing top growlers to carbonate it, they will hold quite a bit better.
Q: Are the 38mm steel growler caps reusable? Are the 38mm plastic growler caps reusable? Which ones are better?
A: Either one can be reused. The wax lined inner part of the metal caps will wear down more through use over time, vs. the plastic insert in the poly seal caps. the thread and cap it self would be good for a while so long as it is not damaged in use
Q: Do these fit most standard 32oz and 64oz glass growlers?
A: Yes, Standard 1/2 gallon and gallon jugs are typically a 38mm opening unless a proprietary design for the lid is used.
Q: Will this bottle cap fit a GT Kombucha bottle? I know the 38-400 size caps do. I need a cap that will seal and keep pressure in. I am brewing Kombucha.
A: These caps will not fit the bottle you have. They are also not recommended for the usage you are describing. Our selection of E.Z. Cap bottles are the most popular choice for Kombucha.
Q: Would this cap be good for the 24-5187 jug for long term use?
A: This cap will work with item 24-5187. We do not recommend using the bottles or caps for long term storage though.