Freeze-Gel Insulated Beverage Cups (4) Keeps Drink ColdPERFECT FOR ALL WINES Achieving the ideal serving temperature for every wine is possible with this set of stemless wine glasses. Each wine tumbler maintains wines temperature better than a normal wine glass INSULATED WALLS filled with proprietary cooling gel work as a wine chiller when frozen. Pop a tumbler in the freezer for white wines or cool in the fridge to keep red wines at cellar temp BPA FREE PLASTIC construction is sturdy and perfectly suited