Blomus' elegant tumblers may look and feel delicate, but don't let that fool you. Made from shock-resistant borosilicate glass, they can be used for hot or cold drinks and have highly effective temperature insulation. When filled with freshly brewed coffee, the cups can be held comfortably without burning your hands. For iced drinks, the double-wall construction prevents any surface condensation—no more water stains, even without a coaster. Plus, the design creates a visual illusion that your drink is suspended in midair for a chic, modern look.