The Acme 230ml (7.7oz) Union mug The Union is perfect for a hearty milk-based coffee or filter coffee. Modelled after a 1930's New Zealand rail union cafeteria mug. Commercial dishwasher safe. Specifications: Outside diameter: 83mm Base diameter: 74mm Height: 88mm The diner range version of the Union Mug is available in eggshell only. For Union Mugs in other colours, refer to the Evolution Union Mugs.