MIAMI BEACH, Fla. – On December 26, the Burger King at 910 Arthur Godfrey Rd. in Miami Beach is allowing customers to exchange their unwanted holiday present for a Whopper sandwich, reports the Miami New Times.

A Burger King spokesperson told the news source that the gift should be unused, and that the “acceptability of items will be determined by Burger King Restaurant personnel in their sole discretion." In addition, "exchanges will be limited to a certain number of gifts."

For those who can't make it to the Miami Beach location, they can use Instagram and Twitter: The first 100 people to post a photo with their unwanted gifts using the hashtag #WhopperExchange will receive a surprise from Burger King.

All gifts collected by Burger King will be donated to the Miami Children's Initiative.

Fernando Machado, senior vice president of global brand management for Burger King, told the news source that the Miami-based company is hosting the Whopper Exchange to help a local organization: “At Burger King restaurants, we are always looking for ways to surprise our fans, no matter if they were good or naughty. The Whopper Exchange will offer our guests the chance to get a flame-grilled gift in exchange for an unwanted one, because this holiday season, we want everyone to receive something they will love.”

The Miami Beach location is the only Burger King in the United States participating in the Whopper Exchange, in addition to select locations in London and Brazil.