https://www.amazon.com/s?k=diversion...s_ts-doa-p_2_6
Many many
Diversion safes
On Amazon.
I don't use a slinky because we have a macerator. I do carry one as a back-up.
I think a phony slinky end, with a bit of brown ugly melted plastic strategically placed on the cap...
I bet it would be safe in the klepto ward at an asylum.