There are a few different ways it could be implemented. A combination of these would be best.
Policy change could expedite this, particularly as an international treaty or agreement. Incentives for zero packaging and reusable packaging would be useful.
A major brand or coalition of brands utilizing the idea could make it mainstream.
Major packaging companies could also drive it from a systems and infrastructure end, developing the system and selling the service to producers as an alternative to disposable packaging.
Companies like Unilever, J&J, Coke have the influence required to engage industry and provoke policy change. (interesting to note Unilever has identified reusable packaging as a part of their packaging roadmap, if they invested in a standardized system and made it available to other producers that would be extremely positive!)
Great idea. I see this as being capable of completely replacing polluting sachets in lower socio economic markets. If Unilever adopt this form of delivery you could end the significant problem of sachet plastic pollution and change the world.