Irony patrol: Recycling bins
blogs.msdn.com
blogs.msdn.com
Keep in mind that people do all sorts of crazy/stupid things with garbage. Things like hiding hazardous materials in the recycling. Hazardous includes biohazards (needles, medical supplies, toxic materials (mercury, reactive chemicals) and outright dangerous materials (explosives, old bullets, propane tanks).
Because of this, they need to design the system to accomodate the intended waste flow -- the safety measures intended to contain the explosion of a half-empty camp stove canister is very different that what is needed to contain a 20 lb propane tank.
When my city went from plastic bins to large, rolling cans last year, we asked what to do with the old bins. They said either keep them for personal use or throw in the trash as they can't recycle them. (I saved a few that weren't heavily damaged from abuse over the years.)