Frozen Food Trays Put in Garbage Black Plastic in general is hard to Recycle. Keep in mind the tip: Bottles, Jugs, Jars and Tubs. Food Trays are outside this reminder. Ways to Reduce Make Your Own Frozen Meals Consider making your own frozen meals at home. It’s easy and can save you money. You can make a little extra of your favorite meals each time you cook or make entire batches to freeze. Follow these tips for best results. Did You Know? Frozen Food Trays: Now More Eco-Friendly Recycled plastic can now be used to make frozen food trays. ConAgra Foods and Associated Packaging Technologies partnered to use a new technology that cleans recycled plastic. Before this technology was available, regulations limited companies like ConAgra to using only new plastic for food trays.