sorry Paul…if you get a Lifesaver bottle, it does filter bacteria…in fact it filters everything. And its good for 1000s of litres. http://www.iconlifesaver.eu/ Theres lots in the article I agree with, and lots I don’t. Get an SAS style hammock with shelter for over top and at least be comfortable. An ultra light sleeping bag weights less that 12 ozs and is a whole lot more comfortable than an emergency blanket. There are so many LED lights out there that you can pack a small crank or solar rechargeable light. Fire might bring the baddies. Better to be safe and unseen than seen an unsafe.
To hold all my clothes, I currently have a large Sandpiper of California Top Stuff sack. It’s big enough that I can throw a couple other bags in it if I had to go through a river and will hold out water for a short time but it’s not technically waterproof. I’ll be replacing it at some point with a compression dry sack like I use with my sleeping bag. This bag is a fairly heavy addition but I figure it’s worth it to make sure I can keep things dry.
The Stealth Tactical bug out bag assumes that you have not been able to make it to a shelter and will need to fend for yourself in the outdoors. As such there’s plenty of tactical gear to keep you moving, keep you dry, keep you hydrated and keep you safe. That includes a dozen packets of purified water, rain ponchos, emergency sleeping bags, a fire starting kit, survival knife, foldable saw, emergency whistle, first aid kit, paracord, multi tool, candles and even a stethoscope so you can monitor your health.