These insulated wine tumblers by Corkcicle are great and serve multiple purposes. They keep cold beverages cold and hot beverages hot and with no condensation. They are an investment, but worth it.
I'm a fan of the Corkcicle Insulated Wine Tumbler with Lid, especially in the heat! Means you don't have to worry about your chilled sparkling getting warm, if you're a sipper like me.