Basic example of a co-packaged liquid and a syringe, contents only, no packaging described

{
  "resourceType": "PackagedProductDefinition",
  "id": "package-with-liquid-and-syringe",
  "text": {
    "status": "generated",
    "div": "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p><b>Generated Narrative: PackagedProductDefinition</b><a name=\"package-with-liquid-and-syringe\"> </a></p><div style=\"display: inline-block; background-color: #d9e0e7; padding: 6px; margin: 4px; border: 1px solid #8da1b4; border-radius: 5px; line-height: 60%\"><p style=\"margin-bottom: 0px\">Resource PackagedProductDefinition &quot;package-with-liquid-and-syringe&quot; </p></div><p><b>packageFor</b>: <span title=\"  the product for which this is one available package type (possibly one package type of several for this product)  \"><a href=\"broken-link.html\">MedicinalProductDefinition/ProductThatHasThisPackType</a></span></p><blockquote><p><b>packaging</b></p><blockquote><p><b>containedItem</b></p><h3>Items</h3><table class=\"grid\"><tr><td>-</td><td><b>Reference</b></td></tr><tr><td>*</td><td><a name=\"liquidItem\"> </a><blockquote><p/><p><a name=\"liquidItem\"> </a></p><p><b>status</b>: active</p><p><b>manufacturedDoseForm</b>: solution for injection <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (doseform#solution for injection)</span></p></blockquote></td></tr></table><p><b>amount</b>: 20 ml<span style=\"background: LightGoldenRodYellow\"> (Details: UCUM code mL = 'mL')</span></p></blockquote><blockquote><p><b>containedItem</b></p><h3>Items</h3><table class=\"grid\"><tr><td>-</td><td><b>Reference</b></td></tr><tr><td>*</td><td><a name=\"syringeDevice\"> </a><blockquote><p/><p><a name=\"syringeDevice\"> </a></p><h3>Classifications</h3><table class=\"grid\"><tr><td>-</td><td><b>Type</b></td></tr><tr><td>*</td><td>syringe <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> ()</span></td></tr></table></blockquote></td></tr></table></blockquote></blockquote></div>"
  },
  "contained": [
    {
      "resourceType": "DeviceDefinition",
      "id": "syringeDevice",
      "classification": [
        {
          "type": {
            "text": "syringe"
          }
        }
      ]
    },
    {
      "resourceType": "ManufacturedItemDefinition",
      "id": "liquidItem",
      "status": "active",
      "manufacturedDoseForm": {
        "coding": [
          {
            "system": "http://example.org.uk/fhir/doseform",
            "code": "solution for injection"
          }
        ]
      }
    }
  ],
  "packageFor": [
    {
      "reference": "MedicinalProductDefinition/ProductThatHasThisPackType"
    }
  ],
  "packaging": {
    "containedItem": [
      {
        "item": {
          "reference": {
            "reference": "#liquidItem"
          }
        },
        "amount": {
          "value": 20,
          "unit": "ml",
          "system": "http://unitsofmeasure.org",
          "code": "mL"
        }
      },
      {
        "item": {
          "reference": {
            "reference": "#syringeDevice"
          }
        }
      }
    ]
  }
}