Porcelain is the industry gold standard for heat retention. Double-walled glass is best for visual appeal, while ceramic/stoneware offers a handcrafted feel.
Fellow Junior Demitasse Double Wall Ceramic Coffee Mug - Refined and Sophisticated Espresso Cups, Matte White, 2.3 oz Shot Cup Set of 2, 65 g HK$556.32(US$71.00) Go to product viewer dialog for this item.
A tapered or egg-shaped bottom helps the espresso flow down the sides, preserving the delicate bubbles in the crema. 🏆 Top Recommended Espresso Cups