And they come with a mystery summertime scent.

U.S. Postal Service Scratch and Sniff Popsicle Stamps
Credit: Courtesy of USPS.COM

Get ready to seal your snail mail with the sweet scent of summer as the U.S Postal Service just announced their first ever scratch-and-sniff stamps.

Featuring the work of California-based designer, Margaret Berg, the watercolor illustrations will feature all your favorite icy treats from rainbow pops to chocolatey delights. The set includes a total of 10 First-Class Mail Forever stamp designs, designed by U.S. Postal Service art director Antonia Alcalá and designer Leslie Badani, who has helped create U.S. commemorative stamps since 2011.

As for the exact secret scent—there will be one for the entire set—you'll have to wait until to official unveiling ceremony on June 20 to see, err, smell, what it is. Classic fruit flavors, like kiwi, watermelon, berries, and oranges have been hinted at, according to the press releases. (Anyone else dreaming of Creamsicles?) The delicious debut event will take place at Thinkery Children's Museum in Austin, Texas, and is free and open to the public.

Can't wait to add this drool-worthy collection to yours? Stamp enthusiasts can snag their 20-stamp booklets by pre-ordering here! Don't forget to share how you deck out your letters by using the official hashtag #FrozenTreatsStamps. And if you're inspired to create the next stamp design, the Citizen's Stamp Advisory Committee invites you to submit your suggestions here. Happy mailing!