The aluminum and plastic is often repurposed into developing products. This process is produced more difficult when elements are tightly layered, or are heavily contaminated. Pizza bins with many grease may cause similar issues, as the fats are not able to be separated due to hydrapulper operating at cooler temperatures https://gabletop.business.blog/2024/10/05/embracing-sustainability-with-water-in-gabletop-pak/