Corks Alternative ways to recycle Mixed Organic Waste Plastic Corks: Too Small to Recycle Many synthetic corks are made out of plastic #7, but unfortunately are too small to be recovered by sorting equipment, so they go in the trash. Composting Natural Corks You can compost natural corks, but they will take a long time to break down unless you break them up into small pieces first, or even better, run them through a blender. Alternative Ways to Recycle CFCA Dropboxes The Cork Forest Conservation Alliance collects and recycles natural corks in dropboxes in many Whole Foods stores, as well as other retailers. Find a dropbox here. ReCORK Recycling Program ReCORK collects natural corks so they can be reused in packaging and products such as cork shoes. If you have 15lbs of cork or more, mail them in with a free shipping label. Or find a nearby dropbox. Ways to Reuse Hydrate Your Plants Break up a wine cork and add the pieces to the soil of your potted plants to reduce the rate of water evaporation during hot summer days.