Takeout Containers (Cardboard) Put in Garbage Cart/Bin Food and Liquid Soiled Containers Belong in the Garbage. Not Just Cardboard Cardboard takeout containers can’t be recycled because they’re often not just made of paper or cardboard; they’re usually lined with plastic or wax to prevent liquid from leaking through the container. Ways to Reduce Bring Your Own To-Go Container When dining out, bring a reusable to-go container so that you can bring leftovers home sustainably. Did You Know? The Preferred Takeout Container Out of all the types of takeout containers — aluminum, cardboard, wax-lined paperboard, plastic and foam — aluminum is the easiest for recycling plants to recycle, while foam is the most difficult.