Pizza Boxes Alternative ways to recycle Curbside Organics Pizza boxes are normally food soiled, therefore they cannot be recycled. Please remove any plastic items and place in your organics cart. LunaseeStudios / Shutterstock.com Frozen Pizza Boxes Can’t Be Recycled Frozen pizza box aren’t recyclable because they have a wax coating that contaminates paper recycling. Find out more. Alternative Ways to Recycle Use as Weed Prevention in Your Garden For any gardener preparing to battle weeds, laying down cardboard below the soil works as weed prevention, pizza boxes included. Did You Know? The Cost of Recycling the Pizza Box Greasy pizza boxes contaminate clean recycling and are expensive for the recycling industry: it’s estimated that contamination costs recyclers $700 million per year, because of damaged machinery, the cost of disposing of non-recyclable materials and wasted time. What Came Before Pizza Boxes? Around two-thirds of all pizzas are delivered in pizza boxes. Pizzas first came in wax-lined paper bags just like pies. Between World War I and World War II, they started coming in boxes made from corrugated cardboard.