Now most plastic cans that can be discarded after use are affixed with a number (from 1 to 9) that indicates the type or quality of the plastic. The plastic with the lowest number is the easiest to be recycled by the recycling factory, and the one with the highest number are rarely recycled. 
Those communities that collect all discarded plastic containers for future recycling will dump the higher-numbered plastic into the garbage only when there is obviously no recycler to recycle them.
 consumers can refuse to buy products that are packaged in the highest-numbered affixed plastic products to significantly reduce the long-term non-recyclable waste.