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Sale Price $16.24.
Original Price $20.30 Comp. value
per shirt
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Christmas Joy Proven By Penguin Math T-Shirt
Qty:
Style
Basic Dark T-Shirt
-$1.20
+$8.45
Color & Print Process
Black
Vivid Printing: White Underbase
About T-Shirts
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About This Design
Christmas Joy Proven By Penguin Math T-Shirt
Christmas Joy: Scientifically Proven! This unique and humorous design is the perfect equation for holiday cheer and clever humor. It presents The Unified Field Theory of Joy, humorously demonstrating that the festive outcome (\text{Christmas}) is derived from the core \text{Penguin} variable. The graphic is a detailed chalkboard illustration featuring a cute penguin in a Santa hat, surrounded by academic diagrams and the final Q.E.D. conclusion. It’s an ideal choice for STEM enthusiasts, physicists, math teachers, or anyone who believes that logic and an adorable penguin are the true keys to holiday happiness.
Customer Reviews
4.7 out of 5 stars rating31.6K Total Reviews
31,573 Reviews
Reviews for similar products
5 out of 5 stars rating
By Jenny S.September 9, 2025 • Verified Purchase
Value T-Shirt, Black, Adult S
My 11 yo wore adult XL (5’7” 165#). The 8yo is small framed. She wore adult small and tied it in the back. Dark haired male wore adult large and 5’9”, 110# female wore adult medium . Good quality dark Heather gray, Gildan brand shirt. -it was next up from basic choice and cost about $20 per shirt. Not too thick or thin. Washed and dried well, no major shrinkage. Not see-through. Can wear a bra under it fine. Screen print is just as shown and well done, front and back.
5 out of 5 stars rating
By Jenny S.September 9, 2025 • Verified Purchase
Value T-Shirt, Black, Adult S
My 11 yo wore adult XL (5’7” 165#). The 8yo is small framed. She wore adult small and tied it in the back. Grandma wore adult large with long sleeve shirt underneath. Tall girl adult medium. Dark haired male adult large. Good quality dark Heather gray, Gildan brand shirt. -it was next up from basic choice and cost about $20 per shirt. Not too thick or thin. Washed and dried well, no major shrinkage. Not see-through. Can wear a bra under it fine. Screen print is just as shown and well done, front and back.
5 out of 5 stars rating
By Jenny S.September 9, 2025 • Verified Purchase
Value T-Shirt, Black, Adult S
My 11 yo wore adult XL (5’7” 165#). The 8yo is small framed. She wore adult small and tied it in the back. Dark haired male wearing adult large and female wearing adult medium. Good quality dark Heather gray, Gildan brand shirt. -it was next up from basic choice and cost about $20 per shirt. Not too thick or thin. Washed and dried well, no major shrinkage. Not see-through. Can wear a bra under it fine. Screen print is just as shown and well done, front and back. They printed random cupcake image I downloaded from internet with no problems! Looked perfect! Front design was stock from zazzel.
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Other Info
Product ID: 256159961445240607
Created on: 11/24/2025, 5:36 AM
Rating: G
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