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:
“Love no man in good earnest, nor no further in sport
neither, than with safety of a pure blush thou mayst in
honor come off again.”
—William Shakespeare (1564–1616)
“An evident principle ... is the principle of justice to all peoples and nationalities, and their right to live on equal terms of liberty and safety with one another, whether they be strong or weak.”
—Woodrow Wilson (1856–1924)
“A lover is never a completely self-reliant person viewing the world through his own eyes, but a hostage to a certain delusion. He becomes a perjurer, all his thoughts and emotions being directed with reference, not to an accurate and just appraisal of the real world but rather to the safety and exaltation of his loved one, and the madness with which he pursues her, transmogrifying his attention, blinds him like a victim.”
—Alexander Theroux (b. 1940)