Cleaned up the file from the original, removed the lettering that slowed down the print, and added a spot for 4x2mm (or doubled up 4x1mm) magnets in the base and lid to keep it closed do that you don't need some awkward and unsightly string or rubber band.
Raft: No
Supports: No
Infill: 30% (don't recommend going lower than this as it can break in your pocket)
Detail: 0.15
AA_Holder_4x_02.stl | 1.0MB |