A common sight in most biology or chemistry labs: the goose-neck squeeze bottle.
These bottles “migrated” from my lab bench to my painting bench and are one of the most handy painting tools I have. To use, simply uncap and squeeze to deliver a controlled amount of your favorite cleaner, thinner, or paint: very handy! The tight fitting silicone cap seals the bottle to prevent loss by evaporation.
These laboratory grade squeeze bottles are made out of PET plastic and will hold enamel and lacquer thinners for many years of use with no problem.