I bought three sets, whiskey, wine and margarita. I love them.
Got these for my Dad for Father's Day. He loves them- says he can enjoy his scotch cold and undiluted.
I use them in place of ice and they work like a charm. They make warm drinks fridge temperature, and already cold drinks will get colder and sometime slush. Which is my favorite part... a slushy coke is always nice.
Perfect chill glass
Great Christmas gift