If you empty a bottle inserted in the vagina, the volume of the bottle cannot be (easily) replaced by air or the replacement is at least hindered, compared to emptying in "normal mode", therefore there is low pressure in the bottle. This may raise the probability of the champaign bottle to break. Right or wrong?
If the pressure in the bottle is lower than the pressure outside the bottle, it doesn't empty. You don't evacuate the bottle, create a vacuum, and pop it.
Plastic is flexible, glass, relatively speaking, isn't. Its actually quite strong, just brittle. Thus, the slight negative pressure would have no effect. Whack it with a mallet, though, and you have a problem.
Here's a general safety tip. Don't shove filled or empty glass containers into any body cavity. physics aside.
Regarding the regulations about negative pressure equipments in labs, I wouldn't dare to play around with bottles only because of this - even small - pressure difference. Bottles for beverages aren't made of thick Pyrex or Duran.
Edited by - Zartyr on 4/28/2005 11:09:06 PM
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DenverDon Benevolent
Firmly Embedded in Depravity 5914 Posts 7/02
Posted - Apr 29 2005 : 12:17AM
Negative pressure would not 'build up' because with a slight vacuum inside the bottle and no ability for air to enter, it simply would not empty out. The slight vacuum would remain just that, a slight vacuum.
Hey guys and gals remember that champaign bottles are stronger than regular wine bottles because champaign is carbonated and wine is not. The champaign bottles are made to withstand more pressure than regular wine bottles.