Javex == Canadian Bleach for us Yankees. I thought this may some sort of coffee extract :)<br><br>I am more inclined to use the iodine tablets (Portable Aqua) rather than liquid bleach in my PSK. The only real problem with these tablets is packaging. The sealed glass bottle they come in will not fit an Altoids tin and they must be repackaged in glass with a teflon liner or they lose effectiveness. BlueLine has suitable glass containers. A small vial of bleach would be useful, but I tend to want to avoid liquids, expecially corrosive liquids, in my PSK.<br><br>I have not used or heard of the Coghlans tablets.