I got this special plant waterer that appears to be from the 70's at an estate sale this morning in Arcadia. At first I did not know what it was used for, the "PLEASE KEEP OFF" threw me off. I thought maybe they were just garden charms for whacky old ladies that hate their garden being tampered with. On the ride home the self-watering theory entered my head. Google proved my self-watering theory right when I got home. They look great in my vintage elephant and turtle and are perfect for me since I often forget to water my plants!! Now, if only my cats could read they would be working double duty. It seems all my indoor plants eventually die of thirst or cat snacking.