Our products are filled with whole corn which is grown as cattle feed and not as popping corn. Popcorn has a hard outer shell that causes pressure to build up inside when heated and then suddenly explode. You won’t have a cloth bag full of popcorn after heating our Maine Warmers, but it sure will smell like a bowl of freshly popped corn! Dogs and cats may chew through the fabric of a “Warmer” thinking they have found a snack. Mice love whole corn!