Achieving the ideal serving temperature for every wine is possible with this set of stemless wine glasses. Each wine tumbler maintains wine’s 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 for outdoor use, An insulated silicone band makes for comfortable handling and ensures that this stemless wine glass set will be your favorite new wine accessories Product Material: Tritan, Silicone