I don't know if this is mechanically possible but my inspiration for this was sailing. A common theme I think most characters who sail often will experience is the significant loss of treasure that comes from occassional server crashes. Obviously making the inbuilt loot storage permanent would be problematic because that's a profound amount of storage and so if possible I'd suggest a system where the container stores its contents persistently for a short but reasonable length of time (like an hour) and then reverts to simply being a non-persistent container. Alongside this I'd suggest a reset mechanism where if an item is added or removed the persistence window resets such that as long as characters are loading and unloading the container it will maintain its persistence. I realize the ideal would be for the servers not to crash but in my opinion this would solve the problem in a reasonable fashion for the present time.
Temporary Container Persistence
Moderators: Active Admins, Forum Moderators, Active DMs, Contributors, Suggestion Moderators