Here's a bit of iPaddery from my usual coffee break at Starbucks. It is not as precise as I would like and I need to get more practice. There is a way to draw straight lines on the iPad but it doesn't often work. However this is recognizable as a Starbucks caramel macchiato, sitting on two brown napkins with a green straw. People watched me while I did this drawing, and one of them even took pictures of my screen with his mobile phone camera.
Autodesk Sketchbook Pro on iPad, 6 1/2" x 6 1/2", March 16, 2015.