www.KitGuitarsForum.com

I stumbled on these when clearing out a friend's estate last year. They seem to be widely available in art supply stores etc, and of course online. The ones I "inherited" are three 1/2 oz. plastic squeeze bottles, with three stainless applicator tips, .5 mm, .7 mm and .9 mm. I was about to fret a ukulele and filled one bottle with white glue, and used the smallest tip to run glue into the fret slots. It worked like a darn. Easy to clean with a fine guitar string cutoff, and a bit of a soak in warm water. I don't know how they would work for CA glue. A happy discovery for me . . . . Bruce W.

https://www.jacquardproducts.com/applicator-bottles

Sounds promising. I got a bunch of little bottles from somewhere that serves the same purpose.