I hate those red Coleman funnels. ^^^ They never seem to work right and I spill fuel with them.
I carry a MSR bottle and a small funnel. Just leave the bottle and funnel outside after use and any fuel residue volatilizes; no mess, no odors, no big deal. As long as the seal on your fuel bottle is in good shape I've never had an issue with an MSR bottle and I'm still using ones from the eighties (with new seals). YMMV depending on your level of paranoia.