"The key is a comprehensive program that draws in not just bottles and cans but milk jugs and newspapers and magazines and detergent bottles and all the things that make up the waste in our communities, " Neely says.

NPR: Battle over Method Thwarts Bottle Recycling

Danone, the manufacturer of Aptamil and Cow and Gate baby milk powder, said most supermarkets were introducing a restriction of two cans per customer.

BBC: Baby milk rationed in UK over China export fear