First, it will NOT chill wine to the correct temperature. It WILL help MAINTAIN the temp of already chilled wine--but not for long. You can't insert it into the bottle without pouring out some (warm) wine to make room for it. Then, with each glass you pour, less of the cooling element is in contact with the wine.After 2 glass, only half of the element is in the wine. You must remove the thing to pour wine, so then you have a long, wet object to put somewhere. The cooling element is made of 2 parts of very thin plastic that are glued together, creating a long fragile seam. Handle with care to avoid leakage of the gel coolant inside. It should be a seamless unit, like a test tube, but even if it were, it would still be useless. I wasn't cynical enough to re-gift mine, but I did pass it on to Housing Works, a charity thrift shop, where it will probably be bought by someone who knows nothing about wine (or physics) as a gift for someone who does, and who will grit his teeth, say 'thank you oh so much,' and get rid of it as quickly as possible.The manufacturer DOES stand behind its product, however. A colleague's Corkcicle leaked the first time he used it; the company replaced it immediately.--Bill Marsano is a professional wine writer, formerly wine-and-spirits editor of Hemispheres magazine and currently blogging at pouredwithpleasure.com.