Whiskey Stones Gift Set - Set of 18 Grey Beverage Chilling Rocks in Gift Box with Velvet Freeze Bag - 100% Pure Soapstone Reusable Liquor and Wine Drinking Cubes - Great Valentine's Day Gift for Him

This is a good product, it just cannot achieve the results I would like. As others have said it does not chill to refrigerator levels, but no one quantifies exactly how cold it gets. The rest of this gets math heavy... the short version is that each stone chills my typical scotch serving about 2 degrees Fahrenheit.First some simplifying assumptions - I used 100% alcohol(ethanol) in the calculations... it makes the calculation easier. My typical scotch serving is 100g... you may have a different quantity that will change things.On with the physics:(mC(Tf - Ti)) = -mC(Tf-Ti) is the equation.The left side will be the soapstone; the right is the ethanol. m is the mass in grams;C is the specific heat capacity; Tf and Ti are the initial and final temperatures. C for ethanol is 2.44 J/gK; C for soapstone is 0.98 J/gK; m for ethanol is 100g; m for soapstone is ~20g on average. Ti for ethanol is 294.261K(70 fahrenheit); Ti for soapstone is 273.15K(freezing). We solve for Tf:20g*0.98 J/gK(Tf-273.15K) = -(100g)*2.44J/gK(Tf - 294.261K)19.6Tf - 5353.74 = -244Tf + 71799.684263.6Tf =77153.424Tf = 292.6913K or 67.1 FDoing the same calulation for water gives about a 2 degree change. Scotch should be somewhere in the middle? I had trouble finding specific heat capacity numbers on scotch. So at 2 degrees per stone it would take more stones than is practical for me to chill my scotch to the desired level from room temp.It should be noted that the above math is a final temp when the heat has balanced between the two substances(it also misses interactions with the environment). Drink Hacker did an experiment using 3 soapstones, 20 ml vodka and a thermometer(google it). They achieved 56F after the first minute warming to 64 after 20. I did not experience this. The stone never chilled the scotch to an acceptable level.

Arrived just in time for INDEPENDENCE DAY. The ghost of Paul Revere dropped them at my door hurriedly. Then a bald eagle knew just what time it was. He swooped down amidst the fireworks bursting gloriously in the sky, and summoned the winds of Alaska to instantly freeze the stones. I walked back inside my house to find a 15 year Macallan with a card that read:Drink this responsibly, or don't. I wouldn't. your friend, Marty McFlyAs soon as I opened the bottle, I heard Hendrix cranking out the Star Spangled Banner as it poured. I put the ice cold whiskey stones in the glass and took a sip. A jubilee of red, white, and blue sparks flowed from my fingertips, and then it went black. when I came to, I was in independence hall. Thomas Jefferson had just finished the Declaration. He set his quill down and shot me a hang ten. I took another sip and was back at home where my model girlfriend was waiting on a bearskin rug. A new standard of freedom was conceived that night, and would grow up to be the 57th President of the Unites States of America that would save the world from an invading alien race.

I purchased these as a gift for someone I now live with, and they work extremely well. I will say after over a year of continuous use, they have chipped away and become a little worn around the corners. The one in my house that uses them has never complained about them chipping or coming apart in his drink, so I don't think it's been a problem. They are made of a soft-ish material, so I think it's just wear and tear of throwing them around and cleaning them.Note that these are not ice cubes or anything other than advertised, so while provide a chilling temperature to any drink (we leave them in the freezer in their handy bag until wanting to use), they won't super cool something. They do keep things chilled, and they get used at least twice a month, usually more like once a week, so a good investment on my part I think.

These were a gift for my husband who is a whiskey enthusiast who is trying to broaden his pallet. While he will drink whiskey at room temp, he preferred it a little cool and used to use ice, but that in turn waters it down, which sometimes makes it better, but if you are really trying to understand the whiskey and its flavors, watering it down might not be the best solution.He was excited at first for the stones, but I think it is just the anticipation of this new fancy "gadget" that is sort of in fashion now... the reality is that they are literally just some fancy rocks, that yes, do cool the whiskey down a little. They are not "non melting ice" or some miracle thing that will make your drinks super cold or keep them cold forever. They are just a way to cool it off for a bit- by the time you sip your whiskey and go pour another glass, you need to change out your rocks for a few "fresh" cool ones.

They are what they say they are; stones not ice cubes. I've actually had these for several years and they're the same as when I got them, so there's something to be said about that durability. When you put them in a room temperature drink they pretty much have a minimal affect. Just kind of take the edge off the drink, definitely doesn't make the drink "cold". I tend to like my whiskey on the colder side, so I'll use the big block ice cubes more frequently so I get minimal dilution but actually make the drink cold.

Sort of faddy. Nothing super great or expensive looking about the box or bag, but the stones themselves are nice. Classic soapstone.I noticed some other brands are soliciting reviews for an extra stone (thanks to a review), so I purposely boycotted them and bought this set instead. Those other sets have slightly higher numbers, but with all the soapstone sets, the only people to give negatives basically all say the same thing. I bought this set to fight against stupid practices mentioned above, but don't think it's any different than the other sets that look the same.