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Sale Price £23.13.
Original Price £25.70 per case
You save 10%
I'm Not Operating On Empty Just Operating On Krebs iPhone Case
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I'm Not Operating On Empty Just Operating On Krebs iPhone Case
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 scientific attitude iPhone 13 case featuring the saying: "I'm Not Operating On Empty Just Operating On Krebs". Biochemistry truism iPhone 13 case for anyone who knows that the Krebs cycle produces one's own energy! No need to be a runner or a jogger to showcase your educational sense of style with this smartphone case.
Customer Reviews
4.5 out of 5 stars rating179 Total Reviews
179 Reviews
Reviews for similar products
5.0 out of 5 stars rating
5 out of 5 stars ratingBy Heather K.24 January 2026 • Verified Purchase
iPhone 13 Tough Case, Glossy
Wow! For $20 I wasn’t expecting something phenomenal. I was expecting maybe a fuzzy picture but good enough. It’s clear, crisp and looks great! Case is protective.
from zazzle.com (US)
5.0 out of 5 stars rating
5 out of 5 stars ratingBy Vittoria C.26 August 2023 • Verified Purchase
iPhone 13 Slim Fit Case, Glossy
Zazzle Reviewer Program
Everything about this case is fine. I added my own text came out well. I ordered the color black but the sides of my phone case are a faded dark green, not black. And there’s some sort of white shadow on the corners of the vase as well. Not too crazy about that pretty disappointed. Text is good. Clear
from zazzle.com (US)
1.0 out of 5 stars rating
1 out of 5 stars ratingBy Masum U.11 October 2025 • Verified Purchase
iPhone 13 Slim Fit Case, Glossy
Colour changing from black to green very poor.
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Product ID: 256425868600866060
Created on 11/02/2023, 3:13
Rating: G