Double Sided Decals or Stickers

These double sided decals are perfect in terms of getting your message across the public, especially in areas where people come and go at a regular basis like malls, restaurants, stores, boutiques, and etc. You can just stick them onto glass doors or windows.

http://www.visigraph.com/custom-decals-stickers-magnets-and-labels/double-sided-decals-and-stickers/