Custom Lunch Bags & Cooler, Premium 20 Can Backpack Cooler - Heat Sealed & PEVA Lined, The 20 Can Backpack Cooler is designed for those always on the go. This backpack cooler features a padded back panel and comfortable backpack straps for easy carrying. Grab and go with the removable, adjustable shoulder strap with shoulder pad. This cooler is heat sealed and features PEVA lining. ... #4200-21 $27.86/each.