Make your next gathering a little more cosmic with these amazing Celestial Coasters ! Coaster set features 8 different designs, courtesy of NASA: The Small Magellanic Cloud. The Helix Nebula. A Light Echo of illuminated dust of supergiant V838 Monocerotis. A Hubble Telescope image of the Pillars of Creation, from the Carina Nebula. The Crab Nebula. The Mountains of Creation in Cassiopeia. M51, a.k.a. the Whirlpool Galaxy. Star clusters from the Tarantula Nebula. You'll find informative text about each image on the backs of each coaster. Use them anytime your favorite group gets together for hot or cold beverages of any kind. Sturdy coasters are made from moisture-resistant board. Laminated for extra durability. Coasters measure 4'' square.