My favourite LED flashlight only costs $10 - so I guess one could considerate it a disposable.
I find it to be amazingly functional. Lightweight, small, powerful, only takes three AAA batteries, and inexpensive to boot. 8 LED's and a plastic case, pocket clip, and magnetized - so you can hang it onto something like the side of your toolbox..
I've had plenty of situations where I held it in my mouth while working on something to free up my hands. Easy to do with this one.
https://www.amazon.com/Ozark-Trail-8-LED-Magnetic-Rotating/dp/B00UZO7TI2
I have several of these...keep one in my kitchen, garage, and glove box.