I carry a number of items wrapped around my rectangular PSK (regular altoids tin) that I am not sure I could either fit in or effectively wrap around a round tin. I have 6'squared HD tin foil folded around the outside that would not fit inside; ~10' paracord that would deffinately not fit within' several ranger-bands for extra water-proofing. The ranger-bands might easily be fit around a round PSK but not so cleanly since they are rectangular by nature. Winding cord on a round tin might be possible but would cause a lump where the cord crossed itself. Folding foil around a round tin would be a work of oragami but could be done. Also all my pockets are rectangular so a rectangular tin fits better and slides around less. <br><br>Of course with all of that wrapped around my tin I almost never open it. My PSK contains items that are mostly un-needed in daily use or are miniature redundancies of other items I carry. <br><br>My sparklite in my PSK is never needed unless I lose my minibic lighter which is in my pocket next to the psk. My wire saw is never needed unless I am actually building an expedient shelter. My mini compass will not be needed unless I am actually lost and stripped of the normal sized compass carried in my belly pack and the one built into my car. The Iodine tablets will only be needed if I have strayed from civilization and forgotten or been seperated from the filter and bottle of potable Aqua that resides in my pack. The PSK does contain a garbage bag to become the container for the items when the psk needs to be cracked so I don't lose any of the items.<br><br>I also do carry an altoids tin of urban necessities such as bandaids, antibiotic, tweezers, cpr shield, laytex gloves, magnifying glass, small blades and straight edge razors, folding scissors, moleskin. The only thing I keep wrapped around this kit is one ranger-band to keep it closed. This kit gets used regularly and I am constantly replacing the contents. I am not sure I actually am happy with the tin for this kit sinces it is not water-proof and the hard tin makes for a little more difficulty in packing and carrying. I may move to a waterproof bag of some sort if I can find one roughly the same size.