[GreenYes] Mouth Smaller at Neck - Why?

["M.Simons" <msimons@no.address>]

Greetings,

   A lot of plastics recycling programs specify that they only collect 1 & 
2 plastics that are "smaller at the neck than at the base" otherwise 
referred to as "narrow-neck" bottles.  However, I have not yet found a 
reasoning for such a thing.  If something is a 1 or 2 plastic, why does it 
matter the size or shape of the item?  I would guess it has something to 
do with the machines they use to sort with.. but I don't know why else 
they would say this.  If 1 & 2 plastics are relatively easier to recycle 
than others, and are having a higher demand, increased economic value, 
etc.. why would they not wish to collect them all?

--
MS

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