Nice little kit. I am not sure how much those water purification tablets can treat...perhaps 1 LT (quart) each?

On a hot day, you can go through a lot more water then that. In my PSK seen here, I carry a minimum of 30 tablets all the time. On a 4-1/2 hour, 12 mile intermediate hike on this past Saturday, I treated 4 LT of water and it is not even hot weather season yet.
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Earth and sky, woods and fields, lakes and rivers, the mountain and the sea, are excellent schoolmasters, and teach some of us more than we can ever learn from books.

John Lubbock