>>2533549In Germany car FAKs come with an expiration date, so if you buy a new one, you put the old one into your kitchen. That is really all you need, i think.
>>2543305GRAYL is overengineered shit. Keep this in your BOB and Bobs your uncle. If it's dry freezing is no problem. If you used it the filter goes into your shirt pocket to keep it above freezing.
These things cost 35€ and weight less than a bar of snickers. I got one in the car, one in my BOB and a one i use for hiking.
Can be rigged into a gravity filter for home use.
>>2546071As for food, at home you keep the stuff you regularly eat, 500g Spaghetti, 1 can of thuna in oil, one can of tomatoes and you have a proper meal. That kind of stuff.
In a BOB i just keep trail mix, a jar of Nutella and shelf stable bread, like this:
https://www.mestemacher.de/wp-content/uploads/2022/01/MM_Salesfolder_HighProteinBrotToastbr_B2B_Seite_1.jpgTo a hungry kid this bread, with a thin layer of Nutella, looks very attractive.
The bread needs to be replaced every 6 month or so, a task in my calendar.