A DEVICE FOR TREATING PERISHABLE OBJECTS OR LIQUIDS AND A METHOD OF FABRICATING THE DEVICE. THE METHOD COMPRISING BREAKING A SINGLE PIECE OF MAGNETIC MATERIAL INTO A PLURALITY OF PIECES INHIBITING MOVEMENT OF THE PIECES WITH RESPECT TO EACH OTHER DURING THE BREAKING OF THE MAGNETIC MATERIAL AND FORMING A MAGNETIC STRUCTURE COMPRISING THE PLURALITY OF PIECES OF THE MAGNETIC MATERIAL. FIGURE 3(C)