You are now able to use persistent storage for Serverless Containers. You are able to create a volume on namespace level and mount it to any container within your namespace. This allows containers to store data on a persistent volume so that the data doesn't get deleted the moment the container is scaled to 0 or deleted.
Persistent storage can be used to store logs files so they don't get lost when a container crashes and you need debug information. Static content uploaded to your container will remain on the volume and you are able to update your container. Files can be generated by one container and be analysed by another container.