Vacu Vin Rapid Ice Beer Chiller, set of two

• When frozen, sleeves chill glasses of beer and keep them chilled for hours
• Sleeves' 6 pockets contain special liquid that freezes solid
• Sleeves slip over standard-size glasses; each sleeve 5-1/4 inches high
• Flexible and virtually unbreakable
• Printed to resemble foamy glasses of beer

Amazon.com Review:
Capable of chilling glasses of beer (or other beverages) in five minutes and keeping them chilled for hours, the two sleeves in this set are perfect for picnics, outdoor barbecues when the weather is sizzling, at the beach, and in the TV room. Each sleeve has six pockets containing a special liquid that freezes solid when placed in a freezer for several hours. The sleeves then slip over standard-size glasses. Flexible, virtually unbreakable, and reusable more or less forever, the 5-1/4-inch-high sleeves are printed to resemble foamy glasses of beer. Storing them in the freezer permits their use at any time. --Fred Brack

Works GREAT and fits a wide range of container sizes.:
This is NOT intended to be used to cool a drink down from room temperature, but to take one that is already at refrigerator cool and cool it down more to near-ice-cold temperatures quickly and keep there for an hour or so. For that purpose it is excellent. This works fine for a wide range of container sizes. Because the inner cooler-slush pouches are in sections, different diameter containers slide in and the pouches squeeze around the container sides to fit tightly. I've used it with the standard 12 oz can as well as 12 oz, 16 oz, 1/2 liter, and even up to 20 oz bottles. And from tall skinny longneck beers to short squat soda bottles, It will probably be too loose on containers narrower than a longneck, and a 20 oz soda bottle is about the largest it can take. The cooler takes about an hour or two to go from room temperature to fully charged, and when put around an already refrigerated drink, it will cool it even more to "ice-cold" temperature and then keep it cold for an hour or so. Again, it doesn't have the cooling capacity to cool a room temperature drink down to refrigerated temperatures, so it's not a replacement for already keeping your drinks in the refrigerator, but if you're like me and prefer your drinks cooler than refrigerator temperatures, this is excellent, especially if you don't like your drinks watered down by melting ice!

FANTASTIC CHILLERS:
I have got these drinks chillers and I find them absolutely terrific at keeping your drink ice cold. Rather than using them to chill the can/bottle I find them most effective for keeping them ice cold for as long as I need, or as long as the drink lasts!! They're also great for picnics and on the go.

Use with care. . . .:
Good beer tastes best cooled to between fifty and sixty degrees. Bad beer should be cooled until it's too cold to taste. Either way, these little sleeves will bring good beer to drinkable temperature in about ten minutes if it's in the bottle, five in a can. Bad beer takes a little longer, but if you're lucky, by then you will have found something else to drink. Don't overchill good beer: it becomes hard to taste. Don't drink beer that has to be near-frozen to be palatable: it's bad for the spirit. Lynn Hoffman, author of Beer and the Nature of the Universe and the properly chilled bang BANG: A Novel

I use it all the time - well worth the money:
It is good for cooling a beverage that is warm but I use it even more to keep a cold beverage cold. I like my beer and soda especially cold and this does the trick - also on a hot day I never get that last warm sip of beer. Remember those can covers we used in high school that made a beer can look like "Mountain Dew" but the lable actually said "Mountain Brew"? Well this has the opposite effect - it make it look like I'm drinking beer when I'm only sipping a Pepsi.

Beer Chiller:
My family enjoys this product. It works very well at keeping drinks cold. However, it only makes a slight difference in temp. if the drink is already warm. It is best used on cool to cold drinks. It fits any average size can or bottle, as well as, some glasses.