What is this contraption? It's pvc with a weighted bottom, holes on the sides for a hollow pipe with a handle/hole to go through

The white section is a thick PVC pipe, the bottom is weighted with a heavy rock. The pipe that passes through the holes in the side of the pvc is hollow and also has a red rubber handle/end and a hole almost halfway down. Found it in some boxes from my wife's grandparents. Thanks for any help!