Sun's Tea(TM) (Set of 2) 20oz Ultra Clear Strong Double Wall Insulated Thermo Glass Tumbler V3 Highball Glass for Beer/cocktail/lemonade/iced Tea (Real Borosilicate Glass, Not Plastic) QUANTITY: Set of two large 20oz (600 ml) Double Wall Glass Tumblers. DURABLE AND HIGH QUALITY GLASS: Made of lead-free high quality real Borosilicate Glass. Designed for your everyday use. These double wall glass tumblers are sturdy and durable, passed freefall ice ball impact test from 12 inches height. DOULBE WALL THERMAL INSULATION: Insulated tumblers keeps cold drinks cold and hot drinks hot,the outside surface always feels comfortable in hand. Perfect Non-Slip Grip USABILITY: The Ultra Clear double walled glass tumblers are perfect to use as clear tea / coffee glass mugs or cups (and thermal coffee mugs), beer glass mug , juice / cocktail glasses etc. DISHWASHER AND MICROWAVE-SAFE: Made for easy care and comes with 6 month manufacture warranty.