About GrafixMat Coasters • Front • Back Story
About GrafixMat Coasters:
Each GrafixMat® is a work of art, masterfully laser-engraved on the cork front with a unique and amusing story colorfully illustrated on its flip-side. For a treasured gift or your own personal collection; select one or create a set of 2, 4, 6 or more from 21 themed Collections totaling more than 500 contemporary and fine art designs. Made from eco-friendly recycled cork from Portugal and Spain, yet handcrafted in the U.S.A. GrafixMats® are so artfully designed and intriguing, we've created a hanging hole in the back of each coaster.
All Natural • Durable • Easy Wash • Singles or Sets • Storage Caddies • 4 1/4" Diameter, 5/16" Thick • Green Certified
Front Design:
Manhole cover designs
The Back Story:
Why are manhole covers round?
Microsoft, the computer software giant, notoriously asked this question in job-interviews. One practical answer being, ”Manhole covers are round because manholes are round.”
In addition to aesthetics and tradition, the round shaped manhole cover cannot fall through its circular opening. A square or rectangular cover may fall-in if inserted diagonally. Circular covers do not need to be rotated to align them properly. A round manhole cover can be rolled and therefore, more easily moved. Also, cylindrical holes are easier to dig, and coincidently, the cross-section of a human beings’ body is roughly circular.