Is this 100% argon gas, or does it also have nitrogen?

The can says it contains a "custom blend of pure nitrogen (N2), carbon dioxide (CO2) and argon (AR)" It works very well.

How does it work and do you need a special stopper?

Looks like the inert gases displace oxygen to prevent oxidation. You do need a wine stopper to keep the inert gas in and additional oxygen out. Doesn't appear to need to be a special stopper though.

Is preservation performance affected if I lay the bottle on a rack after closing? I have a chiller which doesn't accommodate standing bottles.

No. It doesn't need a thick layer of gas to keep the wine protected as long as it stays still, but you might give it just a little more if it's on its side.

Can someone tell me why simply pouring the wine into a smaller bottle, or half bottle, filling to the brim, wouldn't accomplish the same thing?

It would accomplish the exact same thing...though you are the most industrious win drinker I have ever heard of. This is meant to be a quick and easy way to keep a partially full/empty bottle of preserved in its original bottle. There is always more than one way to skin a cat....this is just one of the easier ways.

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🍷 Lock in luxury—preserve every pour like a pro!

FLAVOR INTEGRITY - Keeps your wine’s bouquet intact—no vacuum stripping, just pure taste preservation.
ATMOSPHERIC ARMOR - Utilizes a premium blend of nitrogen, carbon dioxide, and argon to create a harmless protective gas blanket.
UNRIVALED LONGEVITY - Enjoy over 120 full uses per can—preserve your favorite wines without interruption.
VERSATILE PRESERVATION - Perfect for wine, spirits, olive oils, herbs, and fine vinegars—extend freshness across your gourmet collection.
EFFORTLESS ECO FRIENDLY - No assembly or batteries required, with a sleek, dishwasher-safe design for seamless use.

The Wine Enthusiast Private Preserv Preservation Spray is the world’s #1 rated wine preserver, delivering over 120 uses per can with a safe, inert gas blend of nitrogen, carbon dioxide, and argon. It protects the flavor and aroma of wines and other gourmet liquids for days, weeks, or even months without vacuum damage, making it an essential tool for the discerning connoisseur.

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AR$93018

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Product Dimensions	26.67 x 15.24 x 15.24 cm; 0.28 g
Item Weight	0.01 Ounces
Item volume	8.57 Milliliters
Dishwasher safe?	Yes
Is assembly required	No
Number of pieces	1
Batteries required	No

Wine Enthusiast Private Preserv Preservation Spray

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