ThisWear 21st Birthday Gift Decoration Bottle Coolie Made 1998 2 Pack Magenta The best birthday gift is a funny birthday gift. Celebrate with a funny 21st birthday gift! Fits most types of 12oz longneck bottles. Zips open for easy use. Machine washable. Premium 1/8" thick high density open cell polyurethane foam keeps beverages cool. The pictured design will be featured on both sides of the coolie so that you can see it from every angle.