A very early stage working draft on aluminum so I can put things here
The Aluminum Can Advantage Key sustainability indicators for the aluminum can industry
Most of all, aluminum cans are most often recycled over and over again in a truly circular, closed loop recycling process. When recycled, glass and plastic are often turned into a into a different product that is not recyclable or is unlikely to be recycled again. For example, a PET bottle might end up as carpet fiber or a t-shirt. Aluminum cans, meanwhile, can be recycled infinitely to make new cans.
KPI measures for aluminum in consumer beverage containers
Sustainability advantage of cans (addresses both aluminum beverage and steel food cans)
Good source for short overviews and facts on recyclability, circular economy, economic impacts of recycling, waste prevention