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$78.65
each
Gravitational Blueshift Metal Lunch Box
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Colour
Blue
About Metal Lunchboxes
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About This Design
Gravitational Blueshift Metal Lunch Box
A multi-coloured, fractal representation of gravitational blueshifting; the shifting of light towards the blue end of the spectrum that occurs as photons become more energetic when falling into a gravity well. Add your own text.
Unlike the more commonly known Doppler blueshift, an apparent effect which is the result of motion towards the observer, gravitational blueshift is real, independent of the received angle of the photon. Gravitational blueshift is a natural consequence of conservation of energy and mass-energy equivalence.
Customer Reviews
4.8 out of 5 stars rating67 Total Reviews
67 Reviews
Reviews for similar products
5 out of 5 stars rating
By Hugh W.10 March 2019 • Verified Purchase
White
Zazzle Reviewer Program
I'd been experimenting with transferring designs to other products when my wife noticed this old time metal lunchbox. I knew she wanted it thus I created a special one just for here with a couple of her favorite photos I'd taken. Excellent. The cloud image on the front is her favorite of the two. It was taken right off our back patio. The other image was in West Texas several years ago, wide open spaces and roads.
from zazzle.com (US)
4 out of 5 stars rating
By H.19 November 2018 • Verified Purchase
Stainless
Zazzle Reviewer Program
This is a standard metal lunchbox that appears to work just fine. We designed this box ourselves with an uploaded photo and custom text on the front and back. It looks absolutely beautiful except the front of the lunchbox is not centered like it shows in the photo. The print borders don't align with the inset flat part of the box where the preview photo online showed it perfectly centered in there. The back looks nice and centered though.
from zazzle.com (US)
5 out of 5 stars rating
By Karen L.18 July 2025 • Verified Purchase
Blue
This lunch box is great! Being able to put any picture on the lunch box is a great option. I am a huge fan of Disney as well as Alice in Wonderland and this satisfies both of my collections. It is a very well made lunch box for anyone.
I am using my lunch box to hold some of my collectable Disney pins. I love it!
from zazzle.com (US)
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Other Info
Product ID: 256554626670783328
Posted on 12/11/2017, 8:49 AM
Rating: G
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