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.
Iirc part of the reason for sterile releases is to shift the populations. So for example they release them for malaria-carrying sub-populations but leave intact clean populations to fill in the niche.
There’s also some experimentation with releasing fully fertile specimens that have a specific gut bacteria which makes them unable to carry some of the diseases impacting humans, and is passed down to the young.