Safety
Vacuum flasks are an implosion hazard, and especially glass vessels can shatter violently. Chips, scratches, or cracks can be a starting point for vessel dangerous failure, especially when the vessel temperature changes rapidly (due to adding hot or cold liquid). Glass vacuum flasks are usually contained in or coated with plastic or other materials to protect from physical damage, and to contain fragments should it break.
In addition, cryogenic storage dewars are usually pressurized, and can explode if pressure relief valves are not used.
Read more about this topic: Vacuum Flask
Famous quotes containing the word safety:
“Firm, united, let us be,
Rallying round our Liberty;
As a band of brothers joined,
Peace and safety we shall find.”
—Joseph Hopkinson (1770–1842)
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—Henry David Thoreau (1817–1862)