I got fed up with square boxes that have lid catches that wear out.
This box never travels with me so I'm not worried about it damaging my credit card or attracting metal objects.
Each container is 3cm x 2.2cm and easily contains 4 to 5 pills unless your taking horse tablets in which case ymmv.
The 5 pairs of magnets mean that the lid locates correctly every time and the centre magnet is purely to keep the lid attached while it is being rotated.
See notes for parts list and instructions