I can see the utility in this product, because at least a portion of the box is recyclable—if reusable plates are used to prevent contaminating the perforated pizza box top with grease. Furthermore, it’s simple and doesn’t contain any dyes or inks, so it certainly can be used for suppressing weeds or composting if there is an insignificant or negligible amount of grease. According to the Stanford Recycling Center:
Pizza boxes are made from corrugated cardboard, however the cardboard becomes soiled with grease, cheese, and other foods once the pizza has been placed in the box. Once soiled, the paper cannot be recycled because the paper fibers will not be able to be separated from the oils during the pulping process. Food is a major source of contamination in the various paper categories.
Regarding composting greasy pizza boxes:
Another option to recycling cardboard is to compost it, although the grease rule still applies here as well. “Even with oils, you shouldn’t compost [greased cardboard]. It causes rotting, you get more bugs and smell and it’s just not good for the plants,” said Gellenbeck.
Hat tip to Kevin.

















