We research all brands listed and may earn a fee from our partners. Research and financial considerations may influence how brands are displayed. Not all brands are included. Learn more.

McDonalds-Clothing Line
This photo provided by McDonald's shows the company's McDelivery Collection, a new clothing line that includes an adult-size Big Mac onesie.

McDonald's is celebrating the expansion of its delivery service Wednesday by giving out free Big Mac onesies and other merchandise.

As part of the expansion of McDelivery, more than 1,000 McDonald's throughout the country are giving out free fast-food themed swag to people who order through UberEATS, Uber's food-delivery app. The merchandise includes slip-on sandals, sweatsuits, onesies, picnic blankets and pillowcase sets that have burgers and fries on them.

"Whether you’re snuggled up on your couch and craving a Big Mac, or hanging in the park with friends and want some fries to share, your McDonald’s favorites are at your fingertips thanks to UberEATS," the fast food chain said in a statement.

Some celebrities, including Chrissy Teigen and Olivia Culpo, got their hands on the "McDelivery Collection" earlier this week.

The delivery expansion includes McDonald's locations in Los Angeles, Chicago, Columbus and Phoenix.

McDonald's launched its delivery partnership with UberEats in January, testing the service at 200 restaurants in Florida.