Soda Fountain Favorites USPS Forever First Class Postage Stamp Parties Celebrations Weddings Showers Icecream 1 sheet of 20 Stamps Issued in Sheets of 20 easy to use, Self Adhesive Forever stamps will always be valid for first class postage even if rates change Issue Date: June 30, 2016 The U.S. Postal Service celebrates soda fountain favorites the cold, sweet treats beloved by people of all ages. Great for weddings, Parties, Showers, Celebrations, Ice cream socials