Doppler effect coffee mug

Marsoni

M251S

$14.18

Get it in 3 business days with 1 day shipping. Friday, May 29

Doppler effect coffee mugCoffee mug design visualizing the Doppler effect Doppler effect or doppler shift is when a source of wave is moving away or towards an observer. As a result the wave frequency is increased or decreased and the amount of change depends on the speed of the moving object. This is the reason that the siren of an emergency vehicle passing us sounds higher as it approaches us and after it passes us it's higher. Another very common instance of it is the so

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Photo is just for size comparison. It’s really hard and not chewable but he’s already put a dent into it, as you can see. Not sticky, smells right out of the packaging !! We loved that! Its size is about a 20 oz Powerdrink but it’s sturdy and heavy. It’s going to last us such a long time . The only thing is the logo might be worn off sometime soon. Go birds! 🦅

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Reviewed in the United States on November 8, 2025

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Kathy Bramlett

Belleville, US

★★★★★ 5

Absolute perfection

Style: Goal Post Chew Toy, Color: PITTSBURGH STEELERS

Perfect in every way Our dogs love them & they are sturdy so they last a long time

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Reviewed in the United States on February 28, 2025

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Michelle H

Cuba, US

★★★★★ 5

Perfect puppy toy!

Color: Pig Balls

The best puppy toys! These will have your pup happy as can be and well worth it! They are extremely loud so fair warning but bringing joy to your dog makes it worth it. Durable for a dog who doesn’t destroy things. Size of a clementine

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Reviewed in the United States on May 8, 2026

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Draper, US

★★★★★ 5

Puppy loves them!

Color: Pig Balls

I boutgh this for my foster puppy that loves squeaky bouncy toys and she LOVES them, she carries one with her everywhere. It is great to play fetch or for her to play by herself, it keeps her occupied. For reference she is a 7m old 30lb Heeler/Pit mix and very much a puppy chewing and ripping everything off. These have hold pretty well, we've had them for a few weeks now and they are still going.

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Reviewed in the United States on April 15, 2026