Has Anyone Tried Sugru Moldable Glue?
 

Moldable glue, apparently cures to hard rubber consistency.

Reviews seem to be pretty good Amazon.

Not cheap, but interesting.

Lots of suggested uses and videos at the Sugru site, e.g.

https://sugru.com/blog/organise-your-pot-lids

Some of the Amazon reviewers found some interesting uses for it also.