In template:

    {% compress css %}
        <link rel="stylesheet" type="text/css" href="/static/foundation/stylesheets/globals.css"/>
        <link rel="stylesheet" type="text/css" href="{{ STATIC_URL }}/foundation/stylesheets/grid.css" />
    {% endcompress %}


In settings.py:

COMPRESS_OFFLINE_CONTEXT = {
    'STATIC_URL': STATIC_URL,
    'MEDIA_URL': MEDIA_URL,
}

Debug shows:

/Users/peppe/Envs/Pipiki/lib/python2.7/site-packages/compressor/templatetags/compress.py in render
        rendered_output = self.render_output(compressor, forced)


context
[[{'paginator': <django.core.paginator.Paginator object at 0x102c20950>, 'page_obj': <Page 1 of 16>}, {'csrf_token': <django.utils.functional.__proxy__ object at 0x102ee1850>}, {'perms': <django.utils.functional.__proxy__ object at 0x102ee1890>, 'messages': <django.utils.functional.__proxy__ object at 0x102ee1910>, 'user': <django.utils.functional.SimpleLazyObject object at 0x102ee18d0>}, {'MEDIA_URL': '/media/'}, {'compressed': {'name': None}, 'STATIC_URL': '/static/'}]]