When I was a child I used to love drinking my beverage out of one of my mother's big mugs. When searching for one of my own I could never find one big enough.
I love a big handle, a cup that fills out the size of my growing hands. This has been my visualization of comfort and warmth in a mug my whole life.
So, instead, I made myself one. Given it is not perfect but the idea and concept are there. One day it'll be my ideal mug but until then this makes me happy.