I got a full set of silverware for backpacking that collapses down to about the size of those folding reader glasses (plus a little hard storage case just like the glasses). It’s a spoon, fork, knife, and chopsticks. I think I paid $6 for the set. Not super high quality, since the focus was on weight and utility, but definitely does the job.
I don’t use it much anymore, but it was great for lunch at work, and is good when traveling (staying at hotels and getting takeout - no plastic trash!). I mostly keep it in my overnight backpack so it’s available whenever I’m not home and I can’t forget it.
They don’t come around anymore, but I used to say that I was disfellowshipped/excommunicated, whichever was fitting for whatever religion they were selling. If they ask why, which they basically never do, just say “I’d really rather not talk about it, if you don’t mind…”
They don’t actually want to waste time talking to people who were kicked out of the church for “bad behavior”, and in many cases aren’t even allowed to, so they blacklist your address.
No soliciting signs typically do the job, too, though.