The boys get into a chugging match to see who can put down a bottle of maple syrup the fastest (they’re in Vermont!), but it bothers some of the other patrons who would like syrup for their pancakes. Not only do they not take into account the costs their actions impose on others, but we see a clear example of the rivalrous nature of private goods. While they don’t possess a property right in order to sell the syrup to other diners (the restaurant would have that right), their use of the product prevents others from being able to consume the product.