Best dishwasher-safe filament?

I'm designing something for use inside a dishwasher, and I'm looking for suitable filaments. Right now I'm looking into polycarbonate, but I'm a bit confused by the blends. Are most "PC" filaments pure PC or a blend? I know Prusament's PC is blended with something that makes it easier to print, and it's not ABS because it doesn't have styrene. One of the PC filaments I was looking at said it was 45% PETG, is that what's in Prusament PC? Are they all blends? My printer's bed can only go up to 100c and has a non-heated enclosure (I might try venting a space heater into it), what should I use?