We have around 9-10 App Services in our environment.
Can we store a Custom Backup of all those app services in the same Container in the Storage account?

If we do that, how does Restore work in that case?
How does App Services distinguish their own Backup file in the Container?
Does it depend on the Backup file name or the XML that is associated with it?

In general, what is the best practice here? Shall we use a Single container to store all backups or use multiple containers, one each for app service?