I built this out of scrap I had sitting around. I didn't have any 2" square tubing to make a receiver hitch but I will get a piece the next time I am in the city. I have it bolted to another receiver just for a test.
To use, tilt the trash can back and sit the front on the upper lip at the bottom. Then push the top of the can forward. The middle of the can will hit the upright and if you push it a little more the bottom falls off onto the lowest piece and the top bar hooks into the C channel. The rear wheels are only about 6" off the ground, but I don't have big hills to worry about so it works fine for me.
To remove the can from the holder, you have to lift it up about 3/4" and tilt it back.
Also, I can lower the tailgate with the holder on the receiver.
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