

Pretty much exactly what it sounds like, water that comes in blue cans. The manufacturer claims it has a 50 year shelf life or something.
It costs several times what regular bottled water does, and it’s literally just water, not flavored or sparkling or enhanced with any vitamins or electrolytes or anything, just water in a can. It’s kind of a stupid thing to buy, and arguably you’d be better off just filling up some sturdy jugs from your tap and treating it with a couple drops of bleach and dumping it down the drain every so often, but I can also see the convenience of a buy-one-cry-once set-it-and-forget it prep like that.
Also on iodine, there was a product out there called “Polar Pure” that I fucking love
Unfortunately, it was basically just a bottle of pure iodine crystals, so they got caught up in some new anti-drug regulations and got shut down because iodine can be used to make meth.
But it was a great product, and if you look around you can still find new old stock. It has an indefinite shelf life (iodine crystals don’t go bad) and one bottle was enough to treat something like 2,000L of water.
You filled the bottle up with water, some of the iodine would dissolve into it, and you’d use a capful or so of that concentrated iodine solution to disinfect your drinking water. It had a special bottle design to keep the iodine crystals trapped inside when you poured the liquid out.
Pure iodine crystals aren’t exactly an easy thing to get your hands on, but if anyone is able to that’s probably a good way to go.