Worm bin materials can be made of almost any material, however, wood and plastic are the most common. Below are several advantages and disadvantages to each material. Wooden Bins Advantages - Worm bin materials Wood is very porous, so it allows a significant amount of oxygen into your bin. Oxygen is critical to your worm's survival If built right, wooden bins can be quite eye-catching. Wood is a better insulating material than plastic. This is a great feature if you plan to keep your bin in a cooler location during the winter months. Disadvantages - Worm bin materials