Glass bottles are also safe to clean in a dishwasher, and it’s easy to see when they are sufficiently clean — something that’s not always clear with plastic or metal containers. Of course ...

The ins and outs of glass recycling aren’t always so clear. Glass bottles get broken when they’re recycled, but you don’t want to break them too soon. Other types of glass should not be ...

The recycling plant sells the crushed clear glass to bottle manufacturers, like Ardagh Group in Salem, N.J. When we visited, they were making Snapple bottles, Mason jars and Nantucket Nectar bottles.

In clear bottles its concentration fell 30-45% after 21 days. That compared with a decrease of 25% after 50 days in green bottles, and no decline in those in boxes.

Glass bottles are also safe to clean in a dishwasher, and it’s easy to see when they are sufficiently clean — something that’s not always clear with plastic or metal containers. Of course ...