Here is one of the things I’d take to a desert island, or on any trip where I could reasonably expect to spend some time building models in the hotel/motel room, or the coffee shop, a local park bench, etc:
Number 11165 at
Catalog item 11165
I got mine by losing two of ’em while in Organic Chemistry lab, UC Santa Cruz, 1976-1977 year,, and so I paid for them to get replacements, and when they turned-up later, I kept ’em and put them to use. They weren’t cheap, and aren’t now- the picture shows pretty much exactly what I have and they want $18 for 3 of ’em… sounds expensive until you try to flatten out your own piece of stainless steel rod…. Anyway, there’s nothing better for mixing paint in little jars, and pulling out a drop or two for tiny mixing job, Works FAR better than the 12D nails and pieces of 10 AWG solid copper wire I used to use. In a pinch, a cheap screw driver or a small butter knife would do the trick.