Reddit reviews Sun's Tea(TM) 20oz Ultra Clear Strong Double Wall Insulated Thermo Wave Glass Tumbler Highball Glass for Beer/Cocktail/Lemonade/Iced Tea, Set of 2

Set of two Sun's Tea 20oz wave strong double wall glass tumbler. Made of lead-free high quality borosilicate glass. (not plastic)Designed for your everyday use. These double wall glass tumblers are sturdy and durable, passed freefall ice ball impact test from 12 inches height.New unique 'Wave' design makea it easy to grabe and use. Glass will show briliant 'Light Ring' under light.The Ultra Clear double walled glass tumblers are perfect to use as clear coffee mugs (and thermal coffee mugs), glass beer mug , juice glasses etc.Dishwasher and microwave safe. 7 inch tall, 3 1/4 inch diameter. 6 month warranty info in the manufacture web site