* Save Time and Labor - two-step packaging operation vs. six steps with cartons. * Reduce Packaging Material Costs - eliminate the need for dunnage material and tape. * Save Postage - total shipping weight is reduced. * Improve Productivity - especially important in periods of peak demand. * Save Inventory Space - more mailers can be stored per square metres. * Reduced Inventory - one size fits many items. * Reduced Solid Waste * Greater Security - self-seal closures produce a more tamper-evident seal.