Whirl-Pak 1 Liter Stand-up Water Storage Bags

Originally designed for laboratory work, Whirl-Pak bags make great emergency water collection, purification, and storage bags, and are also great for storing food.  They're completely sterile and food-safe, and will not leach harmful chemicals into your water or food supply.  They are shipped sealed; you can always tell that your bag is completely sterile and has never been used, since you have to remove a perforated tab prior to use.  Each bag has a writable area for you to add notes ("non-potable" for instance).   WhirlPak bags are ideal for survival kits, because they roll to very compact dimensions, weigh very little, and are incredibly tough.  Several US Military Kits specify Whirl-Pak bags for emergency water collection, treatment, and storage.  They can even be used to make an improvised solar vegetation still.  The 4.0 mil wall thickness means that this is a durable bag, extremely resistant to puncture or tearing.   These bags stand on their own thanks the gusseted bottom const