The "Rain Stick" is used to get a lot of water quickly from your bucket to a hanging plant. You put the end in a bucket of water and pull the plunger back, then lift the end up over the plant and push the plunger back out. Simple and effective, with no ladders or falling off of chairs.
That gadget existed in the year 2000. 22 years later Brenda asked where she could find one. I had no luck finding the original Rain Stick or a plunger pump like that -- but I did come up with three squeeze bottles to accomplish the same task.