Thanks. While I wrote the OP I had 'reusable standardized glass jars' as a possible end goal in mind. I'm heartened to hear this goal is feasible. The question remains on how to move the status quo from 'myriad shape plastic containers' as is common in US to 'reusable standardized glass jars' as apparently is common in Germany. This was also common in the country of my childhood due to poverty: there was a single type of yogurt period, thus standardization was trivial, plastic was rare and glass was expensive, thus reuse. In particular as recycling around here is a sad joke. People are harangued to perform the ritual separation of 'recyclable' stuff, which then the garbage company either sends thousands of miles offshore to unclear fate, or just transports it exactly to the same landfill as the regular garbage. Forget about reuse.

https://www.theguardian.com/us-news/2019/jun/21/us-plastic-r...