Duralex Empilable Clear 11-Ounce Stackable Mug, Set of 6

• Duralex tempered glass is 2.5 times stronger than ordinary glass
• Duralex is manufactured to withstand sudden temperature extremes from -4F to 212F and is suitable for hot or cold liquids
• Constant quality control guarantees excellence and built in durability insures that Duralex products will maintain their look for many years
• The Duralex glasses and bowls are stackable for convenient and space saving storage
• Durable stainless steel single tone whistle

Practical, simple, sophisticated. This Duralex Lys Stackable mug will last -- and continue to look great -- through a lifetime of use. The crystal-clear tempered glass is astoundingly strong and shock resistant for hot-and-cold use, and the convenient stackable design saves space in your cupboard. 10 7/8oz. capacity.