When I was in the military, they pulled all four of my wisdom teeth at the same time. The doc gave me a squirter to keep the new holes in my mouth clean.

Fast forward 23 years and I filled the MonoJect 412 with bearing grease and it works like a charm lubing axle bearings. Absolutely no mess and it fits perfectly into the gap between the rollers.

The squirter cleans up and holds up to solvents too.

I went on the internet and these things can be had for $.50 a piece