Our 12-ounce rocks glasses are delicate yet durable. They’re made from the same materials as lab glass (borosilicate glass) which lends them perfectly to both cold and hot beverages. These glasses resemble Basque wine glasses and serve well as vessels for your favorite vino, too. Our rocks glasses feel elegant in your hand and make whatever occasion you’re toasting to feel all the more special, from Tuesday night dinner to Friday night cocktail hour. What’s in it: Borosilicate glass that’s oven-safe. Perfect to show off your creme brulee skills. What’s not in it: Lead, seams, and plastics of any kind. It’s all good: This product is oven safe, dishwasher safe, microwave safe, and heat resistant. Made in China.