Honestly the best way to turn down someone is just to flat out say no, because no, because I don’t want to, because I said so. I am not interested in you, no. You’re by no means obligated to include your reasons and if they insist tell them “because you’re an annoying pest that don’t know when to quit.” That way nobody can really come up with shenanigans to force you into relationship/sex with them. No one can say well I identify as a woman so you a lesbian have to fuck me or else you’re transphobic.
“Crayola ColorCycle will accept all brands of plastic markers, not just Crayola markers. That includes dry erase markers and highlighters! ColorCycle will eliminate placing hundreds of tons of markers into landfills.”
There do seem to be some limits, however, as far as I can tell, anyone can ship in a box of markers. “Any sturdy cardboard box with minimal outer markings will work. The more markers you ship, the more efficient this program will be. We suggest a minimum of 100 markers and a maximum of up to 40 pounds.”