File this under "stupidly simple tools that solve a niche problem".

I use the small Elmer's Glue-All to assemble my various laser-cut wood projects. Just like a ketchup bottle, the glue settles to the bottom, away from the nozzle. With this little holder you store your glue bottle inverted so the glue is always ready to use.

Stupid? Sure.
Useful? You decide.

Enjoy.
Neil