This is the "Day of the Dead" mug by Bespoke Barware - sister company of UK manufacturer CheekyTiki. This is what they say about it... "Our Mexican Day Of The Dead mugs are designed for a single cocktail and come in a selection of 3 colours – this one is red with a yellow interior glaze. The Day of the Dead mug measures 11cm tall by 11cm diam and can hold 500 ml (approx 16 fl oz)." Most of which is true. The red mug actually has the same glaze throughout and there's also a 'secret, one-off colour' of yellow, which was made specially for me after I nagged them about having a set of four differently coloured mugs 'cos that would look better on my shelf.