I bought 2 mixers with a shaker as an alternative to always using ice. Well worth it. The mixers are awesome. They’re sturdy and stay cold most of the day. I’ve refilled the Iceberg 4 times throughout the day and the mixers were still cold when I finished the 4th refill. I use the mixers with powdered drinks and they mix very well. These are the best, in beverage “ice alternatives“ I’ve ever used.