This is an enclosure for esp8266-based devboard with a handful of sensors and a standard 18650 LiIon cell.
See detailed writeup in my blog: https://ncrmnt.org/?p=3251&lang=ru
FDPLAST PLA + SBS
I printed the box with PLA, cover with SBS for a tight fit.
If you want to put it outside - go for ABS for the box itself.