I guess for a couple of reasons I bought a Rubbermaid trash can
One thing that I found out is that some plastics are designed to be kept inside, and some plastics can be taken outside. If you use an inside plastic then the sun will 'cook' the plastic and the container will become brittle. I do not like to think of myself as lazy...I just do not want to do more work than I have to (work smarter-not harder) and a goal was that I was going to create a garden that required little of my attention.
When I got the trash can home I flipped it over and drilled holes in the bottom so that the water can run out. Then I took a soldering gun and cut holes in the plastic (so plants could grow out of the sides) Then I dumped potting soil and wood chips into the trash can. To add more growing medium I added some yard debris (leaves and sticks) then I added some soil that I had. I then placed the trash can on two concrete pavers (to give it a level base) I have learned several things from the trash can garden. One of the things that I learned is that throughout the year I probably only pull about a handful of weeds, another thing that I learned is that the growing medium that is inside of the can stays moist, maby the most important thing that I learned from the trash can garden is that its easy on the back!
The trash can garden is a couple of years old now and som of the growing medium that I placed inside has composted down, so in the past few years the soil level has sunk. So I plan on digging up the onions that are in the can and set some of the soil to the side and I raked up some yard debris to fill up the trash can with (Since I initaly filled the trash can, I have learned that gardners use yard debris and grow on top and the process is called hugelkultur
https://www.permaculture.co.uk/articles/many-benefits-hugelkultur