I know, how cliche can you get? But DH is going to love it. I found some online but I want to be able to hold the thing and make sure it's a good "fit" (we're both picky about mugs!). Any ideas where to look?
Childhood cancer (DH) + chemo + radiation = 0 sperm.
LO #1 - 1 unmedicated/self-monitored IUI w/ donor sperm.
LO #2 - 1 m/c, 2 BFNs, 4th IUI worked (unmedicated/self-monitored with new donor sperm).
Life is beautiful!

Re: Where to buy a "Dad" mug?
You could probably find one in a gift store like Hallmark, American Greetings store. Maybe even a Target would carry one.
Good luck!