• Pixel-art Clustrelle, the Cheerios-Effect Gatherer, on a black mug with the slogan "LONELY BUBBLES ATTRACT AT THE MENISCUS."

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Clustrelle, the Cheerios-Effect Gatherer Mug

\[\ell_c = \sqrt{\frac{\gamma}{\rho g}}\]
$21.99 USD
$21.99 USD
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Size

Floating objects attract via meniscus deformation (Cheerios effect).

The joke: Bubbles cluster at the rim, like grad students at free food. The slogan on the mug reads LONELY BUBBLES ATTRACT AT THE MENISCUS.

Source: D. Vella & L. Mahadevan, Am. J. Phys. 73, 817 (2005).

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

Floating objects attract via meniscus deformation (Cheerios effect).

The joke: Bubbles cluster at the rim, like grad students at free food. The slogan on the mug reads LONELY BUBBLES ATTRACT AT THE MENISCUS.

Source: D. Vella & L. Mahadevan, Am. J. Phys. 73, 817 (2005).

Equations

\[\ell_c = \sqrt{\frac{\gamma}{\rho g}}\]
\[F(\ell) \propto K_1\!\left(\frac{\ell}{\ell_c}\right)\]
SymbolMeaningUnit
\(\ell_c\) capillary length \(\mathrm{m}\)
\(\gamma\) surface tension \(\mathrm{N/m}\)
\(\rho\) liquid density \(\mathrm{kg/m^3}\)
\(g\) gravitational acceleration \(\mathrm{m/s^2}\)
\(F(\ell)\) attraction between two floating objects \(\mathrm{N}\)
\(\ell\) separation of the objects \(\mathrm{m}\)
\(K_1\) modified Bessel function of the second kind —

Sources

  1. D. Vella & L. Mahadevan, Am. J. Phys. 73, 817 (2005)

Field notes

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