Recently the makers of Coravin put out a press release regarding a handful of bottles that ruptured while their product was being used. Coravin is a device that allows a needle to penetrate through the cork, displacing the air with argon while pouring out a glass of wine, and when the needle is pulled out the cork reseals itself like nothing ever happened. Quite a visionary concept that was all the rage until this bottle breakage issue arose.
Having tested the Coravin many times here’s my 2 cents. It is an amazing product but doesn’t quite do all that Coravin claims. Their stance is that you can use this and put bottles back in your cellar for months on months without affecting the integrity. I have gone back into bottles after months and while the wine was still ok, it was not all that it should have been. Regardless, it does allow wine consumers to tap into bottles and see how they are aging and allows a restaurant to serve just about any bottle by the glass. So that alone makes this an outstanding serve and preserve device.
So now there are reports of a handful (under 10) bottles breaking after being tapped into by the Coravin, a miniscule percentage compared to amount of bottles that have been “Coravined”. So how can that happen? In one word…pressure. The way the argon is introduced into the bottle is with pressure. So if there is too much pressure in a bottle, and the bottle itself is made of thinner glass and doesn’t have the punt at the bottom guess what can happen? You got it… crack!!!
But think about Champagne. Those bottles have pressure as well from the secondary fermentation which is what forces the cork out of those bottles. However Champagne is bottled in a much thicker glass so it can handle the pressure appropriately. Most quality wines that you would use a Coravin on also are made of thick glass and I’m sure have not been the culprits in this breakage issue that is all the buzz in the wine community.
My take on this situation is that some wine nuts out there are going Coravin crazy! They are using it on inexpensive bottles of wine when there is maybe only a glass of wine left or so in the bottle. So if you take a thin glass bottle with very little liquid and fill it up with gas, in turn over pressurizing the bottle, of course that bottle will break. I am not saying this is not an issue and yes, Coravin should have tested every facet of the product to avoid this from happening. But if you have one I wouldn’t be too concerned over this ordeal. Just make sure you are using it properly as well as on bottles that can withstand a little bit of pressure. Chances are if you spent $300 on this product you are not bothering using it on very inexpensive wine regardless, so Coravin away!