Just to add another couple of possibilities:
Here in the desert where water is precious, I found the need to rinse out the permanent metal filters outweighed the freedom from paper filters. Also, I didn't like the coffee silt that gets through even the best ones. The nice thing about a paper filter is that it will burn - can even be used as tinder - once the grounds are dumped and it's dry.
Snow Peak makes a very stout stainless paper filter holder that folds flat:
Snow Peak filter holder
And Ortlieb has a filter holder that also folds flat, into which you insert two sticks or utensils to brace it across your cup. With mine I found it worked much better after I snipped a second drip hole in the opposite corner. These weigh almost nothing:
Ortlieb filter holder
Here in the desert where water is precious, I found the need to rinse out the permanent metal filters outweighed the freedom from paper filters. Also, I didn't like the coffee silt that gets through even the best ones. The nice thing about a paper filter is that it will burn - can even be used as tinder - once the grounds are dumped and it's dry.
Snow Peak makes a very stout stainless paper filter holder that folds flat:
Snow Peak filter holder
And Ortlieb has a filter holder that also folds flat, into which you insert two sticks or utensils to brace it across your cup. With mine I found it worked much better after I snipped a second drip hole in the opposite corner. These weigh almost nothing:
Ortlieb filter holder