Maybe it was just me, but one of the first things I noticed when I looked around in painting threads on the forum was that several people had similar looking greek columns as hazard terrain that looked really good. In comments, people mentioned that they were cake toppers.
And maybe I am just an idiot, but when I first tried to find them online, I failed. I would search for "greek columns" and similar terms on amazon, and come up with nothing except life-size stone ornaments for your garden. Adding the word "cake" to the search didn't help.
So just in case anyone else lurking in this forum is as inefficient at searching as I was:
I found them by searching for the terms "wilton grecian pillars" on amazon. That seems to be the recipe for success.
Here is a link for the 4-pack that I got from amazon UK: https://www.amazon.co.uk/Wilton-Five-Gr ... an+pillars
They are 5 inches tall and look like this (Ur-Kek for scale):
The above pack is listed at £6, and they are light plastic and hollow.