People are going to think I'm crazy but here me out:

Instant cold brew crystals--doused with hot water until it melts and then topped off with cold filtered water (both from an instant hot/cold filtered faucet).

This is how I drink my coffee, black, daily.

I got here through a journey.

We have an espresso machine, good beans, etc--my wife still likes it done espresso style but honestly, she can't tell when I make the instant as her latte base. I've tried every single method: aeropress, french press, chemex pour over, etc--I even own a turkish coffee ibrik (which is nice sometimes)...

What I've learned is that only two things matter:

Other than that, the fancy $3,000 espresso machines are maybe adding 0.5% to the end result of the product.

When my wife (who is much more of a coffee addict than I am) started asking about coffee sourcing, inflation, and climate change as part of my emergency prep plan, I started reading up and realized that coffee is a fairly fragile plant that will get more expensive as time goes on.

I researched getting my own coffee plants and growing it myself, but that would be way more work than I was willing to put in (more of a novelty than a real way to get enough coffee beans). I started thinking about buying it in bulk and vacuum packing it and freezing beans, but once beans are roasted, the shelf life goes down significantly. High quality coffee roasters like Stumptown demand that distributors throw away beans after 3 days from the roasting date because the quality drops off a cliff--this is why Stumptown coffee is so damn tasty.

Unroasted beans have a 2 year shelf life. So I started roasting my own beans at home with a Fresh Roast SR800, which is awesome and allows me to get beans to just the right roast. You can also buy bulk unroasted (green) beans, which I always have on my pantry shelf.

But then I realized that there is a huge variety of suppliers now making high quality instant coffee that ships in glass containers (better than plastic) and has a much longer shelf life. I've been stocking up on all different kinds and experimenting and now I have many years worth of instant coffee in my garage, ready to handle a major disaster--and since I drink it basically room temperature (call me a heathen) my requirements for making it drinkable are easily met in any situation.