I’ve got some jewelry from my grandma and great-grandma, but just keep it in a locked medicine cabinet in our closet along with things we don’t want little baby fingers getting a hold of…enough to distract any potential burglars.
Editor’s note: Obviously, if you hide valuables in bottles, make sure they are not see-through.
If it's empty, you can cut a hole in the bottom, for example, clean the inside and make some type of lid, to close it again. It's not like anybody will be inspecting it in detail ;)