Clay Humidifiers?

Clay Humidifiers?

I work at a dollar store. It's a very big dollar store that has a gardening section. Among the lawn ornaments is a box of small clay frogs that have a hollow cone like bottom that can stake into the ground. The box says 'clay humidifiers' and there is a picture of the little frogs all in a lush garden. It doesn't have any information farther then that. Has anyone here heard of these? And how they work? Do I soak the frog before I stake it in by a moisture loving plant, or do I completely fill it with water? I live in such a dry area, these things might be very useful, but then again they might be a bag of shit and somehow kill my plants. I tried to find information on the internet, but nothing came up. All I got were links to guitar humidifiers and clay garden pots.
Update on my progress

Update on my progress

Plant ID? Noooooooooo!

Plant ID? Noooooooooo!

The fresh fruits of warm weather…. (PHOTO HEAVY POST)

The fresh fruits of warm weather…. (PHOTO HEAVY POST)

Fuchsia

Fuchsia

back yard bats

back yard bats

What’s eating my lantana?

What’s eating my lantana?