I work away from home & if the SHTF, I have a 4-7 day 's march to get home. My plans include water & a thermos of cranberry juice (I consider the cranberry juice as a health necessessity & a comfort food). I carry dark chocolate bars as a comfort energy food

I looked at that link and then considered what Doug had to say about "X" piece kits and why advertising guru's tee me off.
That kit is strictly off the shelf components. They need to encourage people to add to the kit. Extra batteries, Purification tablets, something to boil/cook in etc. I could go on for a lonnnnnng time.
Treat it as the core of a much more versatile kit. The water's not a bad idea. There just ain't enough of it <img src="/images/graemlins/frown.gif" alt="" />.

I hope your chocolate bars are in ziplocs, since they tend to melt