I have recently had some mugs printed with my own designs on, and am rather pleased with the outcome!
I used 'TShirt Studio' to print the mugs, and the service I received from them couldn't have been better. Any problems I had were sorted within 24 hours and the mugs are great quality.
I chose designs that would work as a stand alone image on the side of the mug, another great part of the TShirt Studio is that one is able to have a design on both sides of the mug, so it doesn't matter which hand you drink with!
These mugs are now for sale on my Etsy store here.
And if you want to check out the TShirt Studio here is the link to their site,
Thanks for reading