xBloom Flat Bottom Filter Paper Holder. (or similar wave filters. If it doesn't fit let me know, ill create something for you)

Fits plenty. Print in full white or full black or half white half black. or rainbow... your choice. 

Appreciate any feedback!  

(my notes: initially designed for the filters to be upside down on a ‘cone’. but that dint work too well in terms of taking them piece by piece. So i settled with this simple design.)