Paint & Sip Mug

This was a lot of fun!  I painted 'Espresso Yo'self' with the black paint pen and then used a cut out heart from painter's tape to make both hearts.  I used the various enamel paints and tiny sponges to make all the little dots.  There's a ring of gold enamel paint on the bottom.  

My husband likes that he can put his multiple shots of espresso into one cup :)

Is this microwavable with the paint?