"The upscaled lego mug is an exact upscale (except for the thickness of the minifigure mug's wall, which would be impractical to scale up). As a result it works as a mug but comes out with a slightly smaller capacity (250ml to the brim) than most coffee mugs (300ml approx, generally). The recesses underneath fill up if inverted in a dishwasher but it is dishwasher safe. It IS microwave safe (personally tested!). The handle is hollow so it's light enough that it doesn't make the mug top-heavy. For multiple mug-buyers... they are stackable!"