Yeah, the F3 is nice for 8-10bux with a code.
I got a lifetime supply of Glaree E01s for about that, but they’re twisties. Make great zipper-pulls, though.
For twisties where the head might theoretically come loose and fall off, I put a “dot” of duct-tape to hold it in-place. Twists on no problem when you need it, but keeps it just a bit more secure when not in use.