Bodum Pavina 2-1/2-Ounce Double Wall Espresso/Shot Glass, Set of 6 Limited edition bonus pack - pay for 4 glasses and get 6 Mouth-blown, lab-quality borosilicate-glass construction; durable and heat-resistant 2-Layer design creates dramatic optical illusion and prevents sweating and condensation Safe for dishwasher and microwave use Smoothly rounded profiles and low statures fit perfectly in the hand