The glass insert is everything. It slips out so you can wash it or replace it if it breaks. It will keep my champagne cold for hours. They have wine, glasses, tumblers, coffee, mugs, and were all with glass inserts. GiftForHim GiftsForHer WineGlass ChampagneFlute SummerEssentials LTKFindsUnder50 LTKHome LTKSummerEdit