Christopher Burch is bringing his preppy, brightly colored C. Wonder label beachside this summer. On Saturday, the retailer opened the doors of its Southampton pop-up shop, offering summer essentials like beach totes, wicker picnic baskets, and starfish pillows. And why stop at one—Burch (who tells WWD he has an 8,000-square-foot flagship store opening at the Time Warner Center in September) also has a pop-up set to open on June 9 in Nantucket. The first 150 shoppers on Saturday got gift cards for free flip-flops in Southampton, and the same will go for June 8 in Nantucket.