Some areas have local farms and other business that sell or even deliver their goods in reusable containers. Yes, you can still get milk delivered to your door in a glass bottle, with cream on top. They pickup the empty bottles and wash them. There will probably be more ways to get your stuff in reusable or refillable containers as awareness increases. Also, many local business are starting to charge more if you pay with a credit card. Perhaps if someone made it easier or even cheaper for a business to accept bitcoin they would do it?