2 Large Whiskey Stones 64 cm³ (4 cu in) - Man Gift Set - Reusable Stainless Steel Metal Ice Sphere Cubes Beverage Chilling Rocks Whiskey Stones for Red Wine, Bar Beer, Scotch, Vodka Drinks - Silver

Nice, smooth, cubes that work well. I froze the full pack overnight then added 3 to the cold tap water in my Yeti tumbler. Between the insulated tumbler and the frozen cubes, the water stayed cold for hours. An added benefit of the cubes staying on the bottom of the cup and using a straw, is we are always drinking the coldest water in the mug. I was indoors in AC this time. Next test will be in the very warm car. I may use all 6 then and I don't expect miracles but I do know they will perform well.

They work and are good for a whisky or scotch drinker. Chill quickly and are a decent value for the market.

It works fine for white wine as well.

These reusable cubes chill my drink quickly, I got the small one and they look good in glasses too. Also easy to clean and reuse. A good, stylish and practical alternative to ice, highly recommend

I've used it a few times and it feels really good! After freezing, I put it in the whiskey, and it has a very good cooling effect. It doesn't melt like ordinary ice cubes, affecting the taste. It's still ice cold until the last sip. The metal material is easy to clean, just rinse and dry it. Very satisfied!

They're not solid metal they are filled with a liquid

I looked and looked for stainless steel cubes with NO gel inside, i thought i found it, but nope, thin walls of stainless steel filled with gel, and its not as perfectly sculpted as the photos suggest. But its still solid so im sure its not going to leak and should work just fine, will update if it doesnt work good, or has any more issues.

Exactly what i wanted