Rimehold, the Supercooled Sentinel Mug
Pure water droplets can stay liquid down to about −38 °C before homogeneous ice nucleation.
The joke: Metastability: a single nucleation site and the whole thing freezes at once. The slogan on the mug reads SUPERCOOLED. ONE SPECK FROM PANIC.
Source: T. Koop, B. Luo, A. Tsias & T. Peter, Nature 406, 611 (2000).
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.
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.
The physics
Equations
| Symbol | Meaning | Unit |
|---|---|---|
| \(J\) | nucleation rate per unit volume | \(\mathrm{m^{-3}·s^{-1}}\) |
| \(J_0\) | kinetic prefactor | \(\mathrm{m^{-3}·s^{-1}}\) |
| \(\Delta G^{*}\) | free-energy barrier for a critical nucleus | \(\mathrm{J}\) |
| \(\gamma\) | ice–water interfacial energy | \(\mathrm{J/m^2}\) |
| \(\Delta g_v\) | bulk free-energy difference per volume | \(\mathrm{J/m^3}\) |
| \(k_B\) | Boltzmann constant | \(\mathrm{J/K}\) |
| \(T\) | temperature | \(\mathrm{K}\) |
Field notes
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