They could try to do both things (delivering new packages and taking back containers) at the same time. https://en.wikipedia.org/wiki/Milkman https://en.wikipe

They could try to do both things (delivering new packages and taking back containers) at the same time. https://en.wikipedia.org/wiki/Milkman https://en.wikipedia.org/wiki/Milkman http://pocketcultures.com/2012/01/25/argentinean-customs-have-your-soda-water-delivered-to-your-door/ http://pocketcultures.com/2012/01/25/argentinean-customs-hav...