No it is not a toaster.
This is a very simple box for storing your micro SD cards that we lose very easily. They can be accompanied by their SD adapter.
And if you are anxious, you can add an elastic to secure the set.
Is not life beautiful?
Update 22/02/2017 : for convenient for everybody, I modified the files with the thickness 1.4mm to 1.6mm to have a multiple of 0.4mm noze : BoiteMicroSD_V02_001aBase.stl and BoiteMicroSD_V02_001aCouv2.stl