Individually mouth-blown from heat-resistant borosilicate glass, these double-walled mugs keep hot drinks hot and cold drinks cold. A silicone vent at the base of the mug equalizes air pressure between the two layers and inhibits condensation. Lightweight and comfortable to hold, they offer countless serving possibilities, from coffee, tea and cocoa to cold brew, lemonade and more.

• Made of mouth-blown and heat-resistant Borosilicate glass and silicone.
• Set of 2.
• Hydrophobic silicone vent that equalizes the air pressure between the two layers of glass.
• Innovative double-wall construction that keeps hot drinks hot and cold drinks cold.
• Phthalate, BPA, lead and latex free.
• Made in Portugal.
• Dishwasher safe.
• Dishwasher and freezer safe; oven safe to 350°.
• Wash the glasses in warm, soapy water before first use and dry thoroughly.
• Dimensions: 3.75" dia