My new favorite light lube dispenser is a Vape Juice Needle Tip bottle, like this:

I found an empty one in the street (labeled "Creme de Menthe"), rinsed it and squirted water through the needle, let it dry for a few days, then put some Tri-Flow in it. The long flexible applicator straw that comes with the Tri-Flow still has its particular uses (reaching that one RD pivot point way in the back), but for hitting accessible RD pivots with a few drops, or dropping lube into cable housing, the short, rigid needle is a perfect applicator! Easier to aim, and quicker to get lube through than the straw.

I use Chain-L for chain lube, I don't know how something that thick would do through that needle, but if I find another bottle I'll give it a try and report back...