Drink your coffee at different temperatures and discover its unique hidden flavors. Temperature Control is made possible through swirling and the unique Hybrid Thermal Wall. The single-wall top doesn’t have the same insulating properties as the double-wall base. When you swirl your coffee, the single-wall top dissipates your coffee’s heat more quickly allowing it to cool faster. This allows you to take control of your coffee’s temperature by actively swirling your glass.