• Pixel-art Sloshwyn, the Coffee-Walker, on a black mug with the slogan "WALK SLOWER THAN THE SLOSH RESONANCE."

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Sloshwyn, the Coffee-Walker Mug

\[\omega_{mn}^{2} = \frac{g\,\xi_{mn}}{R}\tanh\!\left(\frac{\xi_{mn} H}{R}\right), \qquad \xi_{11} \approx 1.841\]
$21.99 USD
$21.99 USD
İndirim Tükendi
Size

Walking with coffee spills because gait frequency is near the liquid's sloshing frequency.

The joke: Spills are resonance. The slogan on the mug reads WALK SLOWER THAN THE SLOSH RESONANCE.

Source: H. C. Mayer & R. Krechetnikov, Phys. Rev. E 85, 046117 (2012).

Shipping calculated at checkout by destinationMade to order, ships in ~10 days

Details

Size & material11oz · 15oz

Black glossy ceramic mug with a C-handle. Lead- and BPA-free.

  • 11oz: 0.33 l
  • 15oz: 0.44 l
CareDishwasher & microwave safe

Dishwasher safe (top rack) or hand wash. Microwave safe.

ShippingBy destination

Shipping calculated at checkout by destination.

Made to order: about 10 days of production and handling before it ships.

Delivery times & where we ship

Returns & replacements21 days

Every item is printed to order, so we can’t accept returns or exchanges for change of mind, or if you ordered the wrong size or colour.

Print defect, misprint, damage or the wrong item? We’ll send a free replacement, or a refund if you prefer. Report it within 21 days of delivery with a photo; no need to send it back.

Full refund & replacement policy

The physics

Walking with coffee spills because gait frequency is near the liquid's sloshing frequency.

The joke: Spills are resonance. The slogan on the mug reads WALK SLOWER THAN THE SLOSH RESONANCE.

Source: H. C. Mayer & R. Krechetnikov, Phys. Rev. E 85, 046117 (2012).

Equations

\[\omega_{mn}^{2} = \frac{g\,\xi_{mn}}{R}\tanh\!\left(\frac{\xi_{mn} H}{R}\right), \qquad \xi_{11} \approx 1.841\]
SymbolMeaningUnit
\(\omega_{mn}\) sloshing natural angular frequency \(\mathrm{rad/s}\)
\(g\) gravitational acceleration \(\mathrm{m/s^2}\)
\(\xi_{mn}\) n-th zero of J_m' —
\(R\) cup radius \(\mathrm{m}\)
\(H\) liquid depth \(\mathrm{m}\)

Sources

  1. H. C. Mayer & R. Krechetnikov, Phys. Rev. E 85, 046117 (2012)

Field notes

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