Tim Hortons Cafe & Bake Shop is celebrating National Random Acts of Kindness Week by picking up the bill for unknowing customers at the drive-thru.

This is the second year Tim Hortons Cafe & Bake Shop has held its Random Acts of Kindness event. Last year, the chain treated 5,100 customers to a free order. This year, random customers in approximately 250 restaurants will have their meals comped. Those who receive a free order will be given a sticker that reads, "I just received a Random Act of Kindness from Tim Hortons," along with a free coffee card to pass along to someone else.

"We were in awe of the generosity and the significant number of our guests who pay for another person's order almost daily," Mike Meilleur, senior vice president U.S. operations said in a press release. "Their admirable kindness and generosity inspired us to do the same."

Tim Hortons' Random Acts of Kindness event runs Feb. 13-17 at participating locations across the United States.