Review of Swissmar Epivac Wine and Champagne Saver Set

Erik was right.He is not "advocating bad physics".The pressure function of this product does not preserve the ability of the wine to make bubbles after you pour it, any better than an extremely airtight stopper.See for example the Pedrini champagne stopper sold here on Amazon.So this product works, but not because you pump air into the bottle with it.It works because it lets no CO2 out.You cannot keep CO2 in solution by increasing the air pressure inside the bottle.CO2 will always diffuse out into the space above the wine.The amount of CO2 dissolved in the wine stabilizes only when there is enough CO2 above the liquid so that it enters and leaves solution at the same rate (equilibrium).The pressure of the other gases above the wine does not prevent the CO2 from entering or leaving solution.This is known as Henry's Law.An unopened champagne bottle has 3 or 4 atmospheres of CO2 gas (produced by yeast after bottling) above the wine.So unless you pump it with 3 or 4 atm of CO2 and let it sit awhile, it will never be as fizzy as when you opened it.Nitrogen and oxygen are about 10 times less soluble in water than CO2, so you would need 30 or 40 atm of pressure to get the same amount of gas into the wine!

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Product Description:
The Epivac wine and champagne preserving pump is the world's first dual function vacuum / pressure pump. The wine function removes air from the bottle, preventing further fermentation and preserves your wine for days. The champagne function pumps air into the bottle, preventing the dissipation of the bubbles and preserves your champagne for days.The set includes a stand, a patented dual function preserving pump, 2 color-coordinated wine stoppers, 1 champagne stopper and instructions. Gift boxed. 6 inches

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