I took “mug” to mean coffee mug but this is more of a plant cup. The lip of it is not really one for drinking and the inside is conformed to the shape of the character which is not the best for a drinking item. It is adorable and will probably be used for drinking (because I got it for a coffee drinker) but you can tell it is not made for that. The inside is also not coated with the sealer, shiny paint that is on the outside - it is ceramic on the inside and porous therefore not the greatest for liquids. It is also supposed to be handwashed only. Better display piece or plant cup.