285ml/10oz. Pack Quantity: 24 Perfect for serving beer, cocktails and juices, these Arcoroc Stack Up hiball glasses feature a convenient space-saving stackable design. Made from fully tempered glass, the 285ml glasses are extra resistant to shock and impact, and if broken are designed to break into small blunt pieces for added safety. They are also dishwasher safe, allowing for a quick turnaround of fresh glassware during service.