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It Takes A Lot Of Work To Exist (Thermodynamics) Coffee Mug

4.8 out of 5 stars rating
22230 Total Reviews |
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Classic Mug
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Style: Classic Mug

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  • Available in 11-ounce or 15-ounce
  • Dimensions:
    • 11-ounce: 3.2” D x 3.8” H
    • 15-ounce: 3.4” D x 4.5” H
  • Microwave and dishwasher safe
  • Use caution when removing the mug from the microwave. Use a pot holder or glove as necessary if it is too hot to the touch. Do not microwave an empty mug
  • Strong, ceramic construction
  • Meets FDA requirements for food and beverage safety
  • Printed on demand in Reno, NV
  • Do not overfill and be careful with hot liquids that may scald
  • Keep out of reach of children when filled with hot liquid

About This Design

It Takes A Lot Of Work To Exist (Thermodynamics) Coffee Mug

It Takes A Lot Of Work To Exist (Thermodynamics) Coffee Mug

No need to be a physics major or physicist to enjoy any of these gifts featuring the Carnot heat engine, along with the wry truism saying "It Takes A Lot Of Work To Exist 24 Hours A Day, 7 Days Per Week, 365 Days Per Year". Specifically, these gifts feature the second law of thermodynamics. Since any thermodynamic engine requires such a temperature difference, it follows that useful work cannot be derived from an isolated system in equilibrium; there must always be an external energy source and a cold sink. Educational physics attitude gifts for all who work in the thermodynamic sense of the word!
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Customer Reviews

4.8 out of 5 stars rating22.2K Total Reviews
19652 total 5-star reviews1902 total 4-star reviews325 total 3-star reviews141 total 2-star reviews210 total 1-star reviews
22,230 Reviews
Reviews for similar products
1 out of 5 stars rating
By Keira B.August 7, 2025 • Verified Purchase
Classic Mug, 325 ml
I was originally happy about my purchase and Nana loved the gift. HOWEVER, the description specifically says that these are microwave and dishwasher safe, BUT the first time Nana put this mug in the dishwasher it was destroyed. Not impressed..
5 out of 5 stars rating
By Courtney V.December 17, 2020 • Verified Purchase
Classic Mug, 325 ml
Zazzle Reviewer Program
Nana is going to love this gift from her granddaughter! Good quality mug. Photos turned out good, colours are true as expected!
5 out of 5 stars rating
By Zoe J.February 4, 2018 • Verified Purchase
Zazzle Reviewer Program
I am very satisfied with the quality of this product. The printing of the image on the mug was absolutely perfect and the quality of the mug itself was very good as well. I would recommend this product to anyone. I am very pleased with how the printing on the mug turned out. The image was clear, not blurry at all, and easy to see. I would recommend this product to anyone.
Original product

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carnot heat enginethermodynamicssecond law of thermodynamicsworksayingtruismphysicsphysicistgeekhumour
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carnot heat enginethermodynamicssecond law of thermodynamicsworksayingtruismphysicsphysicistgeekhumour

Other Info

Product ID: 168455837288723046
Designed on 2010-07-28, 4:37 AM
Rating: G