My favourite ergonomic stoneware mug collection are shaped to fit against the palm of the hand, warming the bones while you sip on your hot beverage. 
This item is from the gorgeous collection of black mugs, uniquely original one-off pieces of art hand carved using the sgraffito method,
Hand thrown on the wheel, painted with a gorgeous black stained slip, carved by hand with a spontaneous sgraffito design, dried, bisque fired, clear glazed, then high fired for the perfect smooth white stoneware mug.
Mug holds standard cup 250ml.