core/homeassistant/components/romy/icons.json

{
  "entity": {
    "binary_sensor": {
      "water_tank_empty": {
        "default": "mdi:cup-outline",
        "state": {
          "off": "mdi:cup-water",
          "on": "mdi:cup-outline"
        }
      },
      "dustbin_present": {
        "default": "mdi:basket-check",
        "state": {
          "off": "mdi:basket-remove",
          "on": "mdi:basket-check"
        }
      }
    }
  }
}