I have used many wine preservers and this one - so far - has been the best. I have only tested it for a max of 2 days so i still can't say it will work great for a longer period of time (but most of the time I finish a bottle of wine in less than 2 days). After 1-2 days wine tasted the same and the aromas were the same as a just opened bottle. Some vaccum preservers worked ok for me but they always removed the aroma of the wine. With Art the taste and aroma remain exact the same. Lets see if this holds true if the wine is kept preserved for a longer period of time.

**Update**
I have tested this for close to one week and wine tastes the same. Only a couple of complains:
- Using the recommended 2 seconds (difficult to be sure you are using exactly 2 seconds so i think a good assumption is i have been using 2-3 seconds no more) it only last 20 or so times
- When the can is close to the end it stills makes noise of argon coming out of the can but it doesn't preserve the wine. I guess the pressure at this point is low and not enough argon gets in the bottle. So i have wasted a couple of bottles of wine because of this.

So far, so good, 36 puffs and no end in sight. Will see how far this bottle goes, shorter puffs on next one to test. This product works as advertised. Used it on all fill levels in bottles, with last smallest (100ml) amount after 5 days. No signs of degradation. Wines were pinot noir and chardonnay from vintages 2012-2016.

This is a more economic solution to manage consumption than a Coravin, and frankly a Coravin takes counter space we don't want to donate. Also, the Coravin wine would be at ambient temperature rather than serving temperature (PN slightly above "cellar" - 60ish+, whites 10 degrees cooler). (Frig is too cold for red or white to drink, OK to store a treated bottle upright, remove and let warm. If a red is "flabby" at 75 degrees, there is a reason - too warm. If a white doesn't taste good warmer than frig temp, it isn't a well made wine.) Since we're not going to AC the house below mid 70's, the Coravin doesn't work. Maybe it could for you. In the absence of a "unit" Ar bottles work well.

Argon is an inert gas, heavier than air so gravity is your friend (unlike old age). Not much is needed. Please be aware diffusion is a physical process that will eventually cause oxidization even for Argon treated wine because the top of the bottle still holds 21% oxygen (along with .93% Argon). For the technically inclined you can probably find the diffusion coefficients and do the arithmetic on the integrated diffusion equation to calculate a concentration curve. (Can't offer any help. No technical books.)

I will be curious to see how Ar does with an old wine. I doubt it will be perfect because a 20+ year old wine opens in oxygen, fades over time. If it is enough to preserve a top bottle for 2 days, it wins.

August 2018, forgot to update ... Got about 105 puffs from one can (no fewer, could have been a few more). This makes it a fair purchase at the listed price. Nothing has changed since I wronte this. It does keep fine wine for days. You should open the bottle, pour what you wish, spray Ar, recork without letting significant time elapse. If another glass is desired, repeat. Don't wait to apply the Ar to drink both (or however many) glasses.

To the ArT team: Go Boilers!

I used this to "Argon Purge" an NVG optic that I assembled. Usually they are nitrogen purged but Argon is as inert as nitrogen and a little easier to work with. It is heavier than air so spraying it in pushed all the air out the top and I sealed it. Not as good as factory, but better than not purging it at all.

For the price, excellent. To get a NVG purged is about $100+

Works well or preventing oxidation in homebrews but there are cheaper alternative in the market

This keeps an open bottle fresh for many days. As I like to try several different wines, this enables me to taste them without them being spoiled by being exposed to oxygen.