Lots of used items can be recycled into plant containers. First thing that comes to mind is the empty bleach bottle. If you safely cut off the top and then slice 3 holes or slits in the bottom it will work nicely to hold a beautiful pot of plants. You can place the top of an empty blue bonnet tub under the bleach pot. You can set this into a larger prepared bleach bottle without holes cut in the bottom to prevent water spills. The outside container can be decorated with fall leaves that you may have dried in a book, children's art, laminated photos, whatever you like.
I have about twenty lemon tree sprouts that I am planning to transplant into empty plastic dry Sun detergent tubs. I will put gravel in the bottom about 1and a half inches high then fill the rest with potting soil so the lemon trees will have plenty of room for root growth. I have grown lemon trees in the house before and they are great but prickly, so don't place them close to where anyone will encounter them physically. They will bear lemons too. I had a pineapple one year and got a small and tasty pineapple in late summer. I put the pineapple on the patio all summer. They take a lot of water.
There are many other used household items you can recycle into plant containers. Imagination is a great tool.