What are these metal holders?

Sow and Dipity
by Sow and Dipity
I love this picture I snapped of a junk planter at last years Northwest Flower and Garden Show... but can someone tell me what these metal holders are?
  3 answers
  • Jan Nelson Jan Nelson on Apr 08, 2015
    These look like some part of a farm equipment seeder,maybe.
  • Linda Vellucci Linda Vellucci on Apr 08, 2015
    cans???
  • Eli mackewich Eli mackewich on Apr 09, 2015
    Those are cistern cups. In the midwest, the farms used to have the roof water collected for the farm watering and etc. the cistern was a huge dry well dug under the house. Ours was under the day kitchen 10 ft wide and 22 ft deep. The water would run from the gutters to the cistern. There we would turn the cistern cup wheel where these cups went up and over in a line and dumped water over into a bucket or trough. I have many of them hanging on our farm with flowers and etc. in them. Old tale is hang them in groups of three for good luck. Hope you enjoy them. Not many of them left in the world.
    • Sow and Dipity Sow and Dipity on Apr 09, 2015
      @Eli mackewich Thank you!! I knew they ran on a wheel to 'collect' something... but now I know for sure. I appreciate your detailed description :)