Sign Cone is not only a fine indoor cone, but it also makes an Eco-friendly disposable cone for outside use. The cones are designed with an anchor cavity to add anchor weight for protection from the wind. After they are erected, simply add some anchor weight such as sand, gravel, asphalt, rocks etc. In fact, I originally invented Sign Cone for use as a disposable cone when I was in the asphalt contracting business. Please check out BACKGROUND for details.
sign cone are designed with vertical flutes for maximum strength
Corrugated cardboard gets it's strength from the use of flutes, which are crinkled waves between the walls. To achieve maximum possible strength, Sign Cone orients the flutes vertically, as seen in the diagram below.