Raise a glass to Sagittarius B2 (Sgr B2), the first place in the universe known to contain the compound ethanol, the very same present in adult libations! Each circular coaster in this set of 4 is printed on 60 pt. coaster board and will soak up condensation and continue to look great for the next round! (I would know because my kid spilled a glass of water on one, soaking it through, and it still looks good as new.)

The coaster says “Sagittarius Brewing Company” at the top and is flanked by “Known producer of interstellar booze since 1975”, marking the year interstellar ethanol was first reported. In the center is a chemical structure of ethanol with the signal that led to the first detection in the background.

Each coaster set comes with a matching sticker.

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