Shop Cornstarch Utensils, knives, spoons and forks. These utensils are a fantastic alternative to disposable plastic utensils. Cornstarch utensils have a similar look and feel to classic disposable utensils. Made from cornstarch makes this option is compostable and eco-friendly. Forks, knives and spoons available in many different sizes and styles. Cornstarch also known as PLA cannot be used with hot foods or liquids because it will melt make sure before using cornstarch utensils you will not be serving anything above 115 degrees.