I thought about leaving out the Polar Pure, but it has no expiration date and will last virtually forever, whereas the AM expires after a few years and must be replaced. If cryptosporidium is likely, I will use the AM, otherwise the Polar Pure will suffice. Both these methods are only for when boiling is impossible or inconvenient.

True the bandana can filter, but the Millbank Bag is a much tighter weave, and can be used to hold things if need be, such as small edibles.

I have my light, ferro, tinder, and cordage in another kit. But if I have the extra room I might add some of my fire kit.