The model is not very beautiful designed, but well, it has to be functional, not beautiful. I haven't tried it myself, its for a friend, if i know that it works, ill write it here. But until then: Printing at your own risk hahaha.
If the model gets a update because functionality, i'll for sure update it here too.
I printed it with: 0.28 layer height; 4 wall loops, top shell layers and bottom layers; 10% Cubic infill, tree support (for the handle) on my BambuLab P1S.
I choose these parameters to keep the price around 5€ with eSun PLA+ in Black(22,99€/kg) =>5.28€
Its a way cheaper to print than buying similar things online.
I think ABS/ASA or PETG would be better for the use, but i don't have them yet, so i can't print them.
If you have any ideas to improve it, tell me!