Coffee cups for playing

A few days ago, I took my 3-year-old son to a café to grab a coffee together. Well, I had the coffee while he played with his toy cars...The barista was super nice and showed him how to make a traditional Italian espresso. Later that evening, when we got home, my son wanted to "make" me a coffee too, but our cups are ceramic and I figured they'd last about two seconds in his hands. So, I decided to design and print these toy cups that look a lot like the ones we use at home but are m