Kingsford Corn Holders, Assorted Colors, Set of 8 The Kingsford Corn Holders Set is the perfect accessory to corn on the cob. The includes 2 each of the following colors: red, blue, yellow, and black. The ends of these corn holders are similar to corkscrews and are easy to twist into the end of a cob of corn. They are microwave, dishwasher and boil safe. Boil your corn with the holders in place- when the corn is ready, these colorful holders will help butter and salt your corn to perfection.