A handy little multi-purpose flashlight. It's way brighter than the iPhone's flashlight and I bring it along on various trips where it's always unexpectedly useful.
It charges via USB-C and has tons of modes: between two powerful front-firing LEDs to several side-firing ones (blue, red, green, cool white, warm white), and even a UV LED. The case is also glow in the dark. It also has a magnet on the end so you can attach to things. The only downside is that everything is controlled via multiple taps so it's not a bit annoying to turn on and off.