Do you have small ammounts of filament leftover? This micro SD card holder will make use of it! It is small simple model of a micro SD card container that can be printed with little filament. It can be used as a filament sample or even as a gift for a customer. Share what color combinations you printed in the comments! 

Should fit straight away - threads are on a tighter side - if you have difficulties screwing the lid on, try calibrating the flow or scaling the lid up a little. Tested on Calibrated P1S and the lid can be screwed on without problems.