Here is another Idea I am experimenting with tonight...I have taken a TEA BAG! cut it in half...to remove the tea......rolled up 'one' half inserted the 'tube' into my penstyle cartridge, trimmed the length and filled it with juice ....it took a suprising amount of juice to fill it but none of it poured out if I held it upside down or laid on its side.....and this is actually working quite well so far......the thing with the paper towel is that it does end up getting a bit mushy if you keep on drip refilling it....but the tea bag is made of hemp as far as I know and should last for quite a few refills. At the moment this seems possibly even better than the paper towel!