Coasters

Coasters for glasses, various designs or you can have your own design. Various materials

Why is it called a coaster?
Someone observed that passing the bottle from person to person was like the ships that would sail from coast to coast; hence the term "coaster." Later on, in the 19th century, pieces of fabric were used to make it easier to pass the bottle and soak up the condensation and stop it from staining the table.