These definitely impart a chill, and my husband loves that we can just leave them in the freezer and have them ready to go. But, they're a little big for the Glencairn (sp) glasses I also bought him, and he'd ultimately love an even- cooler beverage. He seems to like them overall as opposed to ice since it doesn't water down his drinks, but would love a colder method as well. Very fun for novelty purposes, nontheless. Also, shipping was great and fast, product was just as described, and the glasses were a nice touch as well. I would buy these again, simply because the perfect solution doesn't seem to exist.