Yes! I am using old kombucha bottles with a narrower neck compared to bottles like GTs, and even got new caps for them, and it is so difficult to open them! I have to use a towel for extra grip every time! I thought that new caps would help since maybe the old ones are damaged or worn out in some way, but nope, no difference at all. But it's worth it to be able to use smaller bottles rather than the larger flip top bottles which are great but just not my preference. I also like the fact that I can open the screw top bottles a little bit at a time to let some carbonation out rather than all at once with a flip top bottle!
