The lip needs curving outwards to aid drinking. As it is it will encourage dribbles down the outside. As for the handle - I'm afraid I don't like it. It looks great but from a practical standpoint it doesn't work for me. Excellent render btw!

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All the Woes of a World by Jonathan Icknield aka The Bryster

And in my final hours - I would cling rather to the tattooed hand of kindness - than the unblemished hand of hate...