Just a quick note. For years my father-in-law used a refrigerator, stripped of motor and coils, buried in the backyard.on it’s back to ‘pit’ his potatoes
He would add some straw and store his veggies. The rubber seal was removed as was the [door latch] closure mechanism. A simple handle allowed access with no worry about children getting into trouble. A few holes allowed any water to drain. The local water table is many yards under the surface so that was never a concern. Only about one inch of the refrigerator’s body was above ground.
If use of a refrigerator is not allowed in your jurisdiction, then the trash cans might work. But I would suggest adding insulation prior to dropping the can in the ground.
As always, thanks for the blog and all the fine folks who write in. Thanks, – Hambone