Filling kerosene lamps

Use a large syringe or a battery hydrometer with the hydrometer insert removed.

Have someone else fill them?

transfer the refilling oil to a smaller container -- thereby eliminating the need to try and fill from a gallon, or larger jug........ but I like the idea of the syringe also, would make it easy...... or a turkey baster...............

Maybe an oil can would work.

Picture

Use a bigger funnel to transfer the kerosene from the bulk container into one of the smaller fuel bottles available at sporting goods stores(REI, Academy etc)then use your smaller funnel to fuel the lantern. Or in place of the fancy fuel bottle, just transfer it to an empty 1qt oil bottle (or fuel stabilizer) I have a collection of empty bottles just for situations like this.
Of course, I have been labled a pack-rat before.

***** Roberts has the right idea. I have a turkey baster I keep just for that, it works like a charm!

I have a small hand squeeze pump for my kerosene appliances (15" straight tube up to a squeeze pump, and out a 22" flexible hose).
They can be bought in Canada at Home Hardware and other stores for cheap.
You just have to be sure to drain it when done, optionally toss it outside for an hour or two to dry.
A little overkill for lanterns, but it works better than a funnel for the large kerosene fuel containers.