About the titlis double wall drinking glass setspecial occasions deserve special drinkware - and the titlis double wall drinking glass is sure to wow your guests. These classy tumblers catch the eye with their unique shape and innovative double-wall construction, which creates an optical illusion that makes the contents appear as if gracefully floating in the glass. Individually mouth-blown from heat-resistant borosilicate glass, the titlis double wall drinking glass offer a thermal insulation that keeps hot and cold drinks at their optimum temperature for longer, while regulating the external temperature of the glass. Best of all, these shapely glasses enhance the presentation of your drinks, so they look as good as they taste. From coffee, cocoa and tea to cold brew, cocktails and chilled desserts, these double wall drinking glasses will bring an element of luxury into your home. Main features benefitsset of double wall drinking glasses.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.unique shape means glasses can be stacked for convenient storage. Dishwasher, microwave and oven safe up to 350f176c.available in a range of different sizes.use carewash in warm, soapy water before first use and dry thoroughly. For all subsequent uses, wash and dry by hand or pop in the dishwasher. Titlis double wall glasses are safe to use in the freezer, oven and microwave.