Good idea!

I misplaced an heirloom diamond ring in my hotel room once.

I'd tucked it into a "safe" hiding place when I went swimming -- and then forgot that I'd done that.

(Which reminds me of your dementia post, which I just finished reading!)

My ex husband, who had stopped by to give me a ride over to our son's house, found it for me.

I'd hidden it in the little plastic container where I keep my daily meds.