I've been waiting for a reason to design a hinged object for a few months now, but I didn't get any good idea until now.
Then I've personally switched to classical razor blades for shaving a few weeks ago and I was struggling to keep my 10 blades boxes in an orderly fashion.
I then got this design idea to store the blades boxes.

The principle behind this storage is to get an immediate visual view of the brand/model of the blade box and to open it easily. Once closed, it should be locked in place and require a little effort to open. I also made different heights and stackable option so I can sort blades by type or brand.

The whole storage, including hinges and locks are made in a single print and has been successfully printed at 0.1mm up to 0.15mm. I didn't try 0.2mm as I suspect it will solder hinges and door to the frame but you can try it if you want and get me updated about the result.
I didn't use any support under or within the storage to save matter but it may require post-processing to get clean undersides.
To allow matter to stand on something, I placed small supports between door and hinges, so you have to gently force the first opening. It should then operate without problem, maybe after having removed small burrs.

This model comes in three heights (5cm, 10cm and 15cm) and two versions, one is stackable and the other one has flat top and bottom.
Provided heights does not include stackable stud / space under.