The personalized mug can be used in microwave and dishwasher safely since there's a special type of coating is applied to the mug. Please be noted that although our mug have a high color printed standard, some outside factors will change the original condition. Therefore, you should not use the mug with those machines frequently to maintain the images, the color as well as the text on the mug. 

We suggest that you should set the medium temperature mode when using microwave and only use dishwasher when the cup was used with types of drink contain ingredients cause yellow stains (for the mug have white inside).

If possible, we'd recommend that you shouldn't use washing products contain chlorine for all mugs to prolong their lifespan. 

Hopefully this informations helpfully and we are willing to answer any questions from you by these channels.