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shreddy_scientist , 6 hours ago Ever pop your ears when going up a mountain or during flight? This is air pressure changes. Either way, water tight does not mean air tight, while air tight does mean water tight assuming the material is not water soluble.
Ever pop your ears when going up a mountain or during flight? This is air pressure changes. Either way, water tight does not mean air tight, while air tight does mean water tight assuming the material is not water soluble.