Before collegiate apparel, students proved how much they loved their alma maters by marrying them and helping raise the annual litter of freshmen. Take a modern twist on old-school devotion with today's Groupon: for $15, you get $30 worth of classic college apparel from Billy Tees. The Groupon does not include the flat shipping rate ($6 for the first item; $3 for each additional item), but the value can be used toward shipping.

Billy Tees' online store stocks colorful T-shirts, hats, and baby gear emblazoned with vintage designs from the University of Dayton and Ohio University. Printed on American Apparel shirts, the form-fitting tees declare university pride with enduring designs such as the eponymous Ohio shirt ($23.99) or an antique map from when scientists thought Ohio was the world's geographic center. The Dayton Halfcourt logo tee ($23.99) swathes torsos in red, light blue, or heather gray, and raucously stamps chests with an old-school basketball insignia. Deck tots ages 0–18 months in a heather gray or soft pink Dayton onesie ($19.99) to fuel heated rivalry on the Little Tikes' basketball court. Billy Tees vends only Collegiate Licensed products, approved for authenticity by the respective institution.