Their webbed feet act like paddles and they waddle instead of walk because of their feet. The duck's feet cannot feel cold even if it swims in icy cold water because their feet have no nerves or blood vessels. The duck has water-proof feathers. A special gland that produces oil is located near the duck's tail.
I consider a right handed mug to be a mug held in your right hand with the image facing you. A left handed mug held in your left hand would have the image facing you.