What is a coaster ?

Coaster , drink coaster or beverage coaster or beer mat is an item to rest drinks upon. Coasters protect the surface of a table or any other surface where the user might place a drink. Coaster placed on top of a beverage can also be used to show that a drink is not finished or to prevent contamination

The Design

The pattern of the coaster is Stars , made of Hexagon & Triangle . The color of the coaster is Blue ( almost darkish ) . The shape of the coaster is Square , dimension of it is about
90mmX90mm with the side being about 3mmX90mm