Stephanie Clifford, The Plastic Sandwich Bag Flunks; Schools promote lunch with waste-free packing. New York Times, Aug 27, 2011
http://www.nytimes.com/2011/08/27/business/energy-environment/education-officials-and-retailers-push-for-environmentally-friendly-school-lunches.html?_r=1&scp=2&sq=clifford%20plastic&st=cse
("Many retailers and schools are advocating waste-free options for back-to-school shoppers this year, especially when it comes to lunch. School lists call for Tupperware instead of Ziplocs, neoprene lunch bags instead of brown paper ones, and aluminum water bottles, not the throwaway plastic versions. * * * The trend makes the schools happy (much less garbage).")
My comment:
(a) neoprene
http://en.wikipedia.org/wiki/Neoprene
(a family of synthetic rubbers that are produced by polymerization of chloroprene)
(b) The pendulum has swung back. I came to US in 1984 and found many were disposable. Taiwan could not stand it, as limited space there calls for waste incineration supplemented with little land fill.
(c) There is no need to read the rest.