Decided to have a bit of a play.
This mug was printed in one process in an oven for 8 minutes. Additional time taken to prepare mug (ie. cutting and wrapping) was about 2 minutes which if I decided to do as a bulk option I could probably get down to about 1.5 minutes. Possibly quicker if I got a dedicated cutter of some sort.
Additional cost on top of the normal mug cost is about 15-20p
Not really one for bulk suppliers but if you are on something like Etsy...
Using Listawood mugs as they have always been the best performer (for me) in my ovens. The little bit of blurring is where I should make the cut out slightly bigger
P.S. If you are wondering... Peanut is my daughter's nickname and she loves her Pandas :-)