Double walled cortado glasses are engineered with two layers of glass, creating an insulating barrier. This innovative design serves multiple purposes. First, it keeps the beverage at the ideal temperature for longer. While enjoying a hot cortado, one doesn't want to be deterred by the heat of the glass. The double wall construction means that the outer surface remains cool to the touch, making it comfortable to hold. Simultaneously, the insulating properties maintain the warmth of the coffee inside, ensuring each sip is as delightful as the first.