Working in automation, I've made machines that check for grime and misprints on new bottles and cans.

If a country were to standardize, say, drink bottles, detergent bottles, etc, then this is already a solved problem. Just have a machine clean the bottles to wash away dirt and remove labels, then run it through some image processing software to auto detect any residue. Anything within a certain threshold could either be accepted as clean or needing an extra wash, and anything over a certain % of dirtiness or having undergone N number of washes without getting clean is sent off to be melted down and recycled.

Once it's standardized, the software is made, done, and ready to deploy everywhere without any changes (until the government approves new bottle designs). Facilities would be cheap to build. The only problem is every drink manufacturer in the world would oppose it since they can't make goofily shaped bottles with cartoonish logos everywhere.