I first bought a really inexpensive plastic hanging pot with chain. It was only around $3 which is great compared to these companies that sell these so call special tomato hanging pots for a high price.
I then drilled a one inch hole in the bottom of the pot
Then I added some black material fiber in the bottom. I also cut a X in the material so that the roots can fit through it. This black material fiber is the black paper you can buy to suppress weeds. This will hold back the dirt so that it doesn't drain out your hole! This is really important to add!
Then I stuck through the bottom hole the tomato plant
Once your plant is in place, start filling with dirt. I also planted another one on the top
Here is the finished pot filled with two different kinds of tomato plants. You can also do this to squash or cucumbers too! I have also seen the hanging pots with tomatoes on the bottom and herbs on top!
Here is a picture of a hanging tomato plant in a basket. Doesn't it look great??