Why all the panic?
All you need is a good size mug, even a small soup pan woks in a pinch, a rubber band and coffee filters or a paper towel.
One fine evening all packed up for hunting camp, or so I thought, I got ready for an early morning trek. Forgot the perkulator. So I sunk a paper towel in a mug just low enough to hold some coffee, held in place with a rubber band. Bring enough water just to a boil and slowly pour it over the coffee. Beats the snot out of instant. Drop or two of deisel optional.