This transformative mug offers a science lesson each time you enjoy a cup of coffee. Aptly called the Planet Mug, it features a portrait of our galaxy that, whenever filled with a hot liquid, illuminates facts about the planets. For example, did you know that Uranus spins “backward” as well as “on its side” at a 90-degree tilt? Or that ancient Mars once had a magnetic field? These are just of a couple of things you’ll learn as you sip alongside the solar system. The cup will make you appreciate our incredible universe and prep you for the science category at your local trivia night.


  • Planet Mug holds 12 ounces of liquid.
  • When hot liquid is poured into this mug, facts about the planets will appear. Once the mug cools down, these elements will gradually disappear.
  • Due to the nature of this mug, it is not dishwasher safe but is microwave safe.

About Unemployed Philosophers Guild

Founded in 2011, the Unemployed Philosophers Guild contends that “the unexamined gift is not worth giving” and creates items that fulfill people’s needs for finger puppets, warm slippers, coffee mugs, and above all, laughter.

Customer Reviews

Based on 4 reviews Write a review