About the PILATUS Double Wall Drinking Glass Discover the art of presentation with the PILATUS double wall drinking glass set. With their stunning good looks and innovative thermal properties, these elegant tumblers add the wow factor to a special occasion, from a classy dinner party to a drink with a loved one. Individually mouth-blown from heat-resistant borosilicate glass, PILATUS tumblers keep hot and cold drinks at their optimum temperature for longer. There’s a clever silicone vent at the base of the glass that regulates its external temperature - so you can wrap your hands around a hot drink without risk of scalding, and serve up a cocktail or chilled dessert without leaving messy condensation rings. But it’s the design that will impress your guests the most. The outer wall of the glass has a wavy effect that’s comfortable to hold and impressive to behold, while the double-wall glass showcases the contents while making it appear as though suspended in the air. So your drinks will look as good as they taste! Innovative double wall design that keeps hot drinks hot and cold drinks cold. Also perfect for serving soup or cold desserts. Made of mouth-blown, heat-resistant borosilicate glass. Hydrophobic silicone vent that equalizes the air pressure between the two layers of glass. Dishwasher, microwave and oven safe (up to 350oF/176oC). Available in a range of different sizes. Use & Care Wash in warm, soapy water before first use and dry thoroughly. For all subsequent uses, wash and dry by hand or pop in the dishwasher. PILATUS double wall glasses are safe to use in the freezer, oven and microwave.