The Wikipedia article originally referenced by Sunken mentioned the lime dusted over the broken pots to (probably) reduce the smell of rancid olive oil.
Notably, the olive oil amphora were the only ones apparently not recycled to carry more olive oil. (Wheat, wine, etc were reused in their previous containers.)
Probably because of the smell of old (rotting) olive oil that needed to be carried back to Spain, shipped by ox cart back to the field, held in the sun and insects in warehouses until the olive were ready, then re-filled? Are you going drink that stuff after it sits in oil-soaked rotting liquid for 3-4 months?
On a side note, EVERYTHING in today’s landfills that was ever dumped there is available for immediate and quick and cheap re-cycling! Except the billions of tons of junk dumped by New York in their waters off the coasts that is. ONLY those sanctimonious NY/NJ/CT fools dumped their trash were we cannot recycle cheaply!
And in fact, every pound of every element ever mined is still on earth (a few satellites excepting) already refined from the original ore.
They'll be back.