Strawberry Thief Blue Mug & Brickset from Morris & Co. The tray is in melamine and durable, the mugs hold 18cl. The melamine tiles are not only durable but they are also fantastically beautiful and have a variety of decorative patterns. Use a damp cloth with or without detergent to wipe. Do not place hot objects on melamine as blisters can form and destroy the melamine.