Surprise frugality

I was visiting my nephew in VA.  Keep in mind, he is a bachelor, TA at Virginia Tech....
What do I find on his deck?  CONTAINER GARDENING.  Awesome.
What is even better than that?  The containers used.
I believe that they are pans used to hold surgical instruments.  10 come in one package, open a package, use 2, the rest get thrown out. 
Check out their use.  And there are two for each plant, allowing for drainage, the top one has holes in it.