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:
“There is always safety in valor.”
—Ralph Waldo Emerson (1803–1882)
“I nightly offer up my prayers to the throne of grace for the health and safety of you all, and that we ought all to rely with confidence on the promises of our dear redeemer, and give him our hearts. This is all he requires and all that we can do, and if we sincerely do this, we are sure of salvation through his atonement.”
—Andrew Jackson (1767–1845)
“Once women begin to question the inevitability of their subordination and to reject the conventions formerly associated with it, they can no longer retreat to the safety of those conventions. The woman who rejects the stereotype of feminine weakness and dependence can no longer find much comfort in the cliché that all men are beasts. She has no choice except to believe, on the contrary, that men are human beings, and she finds it hard to forgive them when they act like animals.”
—Christopher Lasch (b. 1932)