I buy groceries for our group homes so I'm at Albertsons well let's just say ALOT!!! Anyway, a cacher I know (DigitalGods) made me a container and I've been carrying it around for awhile. I was looking for a certain kind of place to hide it but i never found it so when i accidentally kicked it out of my truck again this morning i decided i better find a place to hide it before i lost it. It's not the kind of spot i had in mind but i think it works nicely.
There is a good bit of traffic but you're at the back of the store so there is plenty of room to park and even though there were a few muggles in the area, no one paid attention to me.
A piece of metal will be your best TOTT as long as everyone hides it back correctly.
Happy caching!