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I'm Not Operating On Empty Just Operating On Krebs Coffee Mug

4.8 out of 5 stars rating
21784 Total Reviews |
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Classic Mug
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Style: Classic Mug

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  • Available in 325 ml or 443 ml
  • Dimensions:
    • 325 ml: 8.1 cm D x 9.7 cm H
    • 443 ml: 8.6 cm D x 11.4 cm 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
  • 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

I'm Not Operating On Empty Just Operating On Krebs Coffee Mug

I'm Not Operating On Empty Just Operating On Krebs Coffee Mug

Ever wonder how you get through the day? Showcase your wry Krebs cycle (also known as citric acid cycle or tricarboxylic acid cycle) sense of humour with this mug featuring the following scientific saying: "I'm Not Operating On Empty Just Operating On Krebs". Biochemistry truism mug for anyone who knows that the Krebs cycle produces one's own energy!
Words & Unwords
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Artwork designed by
Washington, United States
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Customer Reviews

4.8 out of 5 stars rating21.8K Total Reviews
19258 total 5-star reviews1840 total 4-star reviews325 total 3-star reviews140 total 2-star reviews221 total 1-star reviews
21,784 Reviews
Reviews for similar products
5 out of 5 stars rating
By Anonymous14 December 2025 • Verified Purchase
Classic Mug, 325 ml
Easy to order online. I had to get in touch regarding the customizing- response was prompt and helpful. Mug arrived perfectly customized, and well within the expected delivery time frame.
5 out of 5 stars rating
By S.20 June 2021 • Verified Purchase
Classic Mug, 325 ml
Zazzle Reviewer Program
Very happy with the printing and overall quality of the personalized welcome pack for our employees. Great quality and placement, very happy with how it turn out!
5 out of 5 stars rating
By Kirsty D.7 May 2021 • Verified Purchase
Classic Mug, 325 ml
Zazzle Reviewer Program
Very pleased with the product. Arrived well packaged in one piece and looks good. Exactly as per picture.

Tags

Mugs
citric acid cyclejust operating on krebsim not operating on emptywords and unwordsatptricarboxylic acid cyclekrebs cyclegeek humourbiochemistrybiology teacher
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citric acid cyclejust operating on krebsim not operating on emptywords and unwordsatptricarboxylic acid cyclekrebs cyclegeek humourbiochemistrybiology teacher

Other Info

Product ID: 168551642136782926
Posted on 24/05/2010, 8:37 AM
Rating: G