This bin is a 2x2 gridfinity bin with a brim. I designed it so it better holds my collection of rubber bands. For that reason it also supports using magnets at the top for better stability when stacking other gridfinity objects or to hold down my custom lid with more force, preventing it from opening accidentally. 

There is also a variant without the brim around.

Printing

I designed the bin so the brim (or the holes for the magnets) shouldn't need any supports with the drawback that it isn't a hard edge on the inside.