For a limited time, the chain is offering four of the most popular and top-selling flavors of previous limited-time collections over the past five years.
Guests who sign up for Panera's Unlimited Sip Club through May 18 will receive a free membership to the monthly Unlimited Sip Club program through July 4.
The coffee chain is preparing for the change in seasons with two cooling beverages, the Chocolate Java Mint Frappuccino blended beverage and White Chocolate Macadamia Cream Cold Brew.