The Aluminum and plastic is usually repurposed into making resources. This process is built harder when components are tightly layered, or are intensely contaminated. Pizza boxes with lots of grease can cause comparable complications, since the fats are unable to be separated due to the hydrapulper working at cooler temperatures https://www.tumblr.com/gabletoppak/763465457801019392/gabletop-pak-leading-the-way-in-sustainable?source=share