html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/issues/4076#issuecomment-630662285,https://api.github.com/repos/pydata/xarray/issues/4076,630662285,MDEyOklzc3VlQ29tbWVudDYzMDY2MjI4NQ==,13662783,2020-05-19T08:15:56Z,2020-05-19T08:15:56Z,CONTRIBUTOR,"Opening (and closing) a ZipStore when given a path ending in `"".zip""` would largely solve it I believe -- in fact, I tried just providing a path with `"".zip""` to `to_zarr` before, hoping it would work. (And indeed, I did so because the many small files are troublesome.)

`open_zarr` already automatically accepts path `"".zip""`, so it would be nicely symmetric as well.
However, this behavior exists within Zarr, not Xarray.

https://github.com/zarr-developers/zarr-python/blob/473576f3b17ac4a460dfccbcc4860606cd8123ed/zarr/creation.py#L130-142

I'd be happy to have a try at a PR in principle.

Maybe it could be as simple as adding a `with`?
```python

if isinstance(store, (str, pathlib.Path)):
    if str(store).endswith('.zip'):
        with zarr.ZipStore(store) as zstore:
# etc
```

In the `xarray.backends.api.to_zarr()` function.
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