Pepsi is taking another shot at its chief competitor with a summer marketing effort riffing on the iconic “Share a Coke” campaign, per details shared with Marketing Dive.

In the mid-1980s, Pepsi scared its Coca-Cola competitors into changing the entire Coke formula, much to the displeasure of the latter company's customers.

Coca-Cola, which did not immediately respond to a request for comment on the Pepsi Challenge, is celebrating National Have a Coke Day in a different way.