No, the title is not a beginning of a bad joke!
You are looking for a magnetic key container that contains a logbook only. Please be sure to bring your own writing implement!
Although it's been many years since I've lived in the Toronto area, I have wanted to place a cache in the area as a leave behind. Just up the street, my youngest brother has just started caching and I've asked him to hide one here under my name. So, the priest and cable guy are going to share this cache. He'll maintain it, and I'll be the owner.. Please be aware of muggles in the park and to replace the cache as you found it.