1. PERFECT FOR ALL WINES 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 2. INSULATED WALLS filled with proprietary cooling gel work as a wine chiller when frozen. Pop a tumbler in the zer for white wines or cool in the fridge to keep red wines at cellar temp 3. 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 wine accessories 4. SERVE YOUR WINE AT THE RIGHT TEMPERATURE Generally, white wines should be served cold at 43 to 53 degrees Fahrenheit, and red should be served at just cooler than room temp, around 58 to 60 degrees Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.