- Remove magnets before washing lunchbox.
- Made out of synthetic rubber certified safe of toxins (unlike PVC magnets)
*If the magnets get wet it can cause the magnetic material to degrade and attach itself to the top of the lunchbox (which is magnetic). This can cause rusting. Making a thick paste of vinegar and baking soda, leaving it on the marks for at least an hour and then scrubbing it off and rinsing will clean the spots.