This is a shirt design that I did to a themed contest way back in 2013. The theme was "Show your love for coffee" and I wanted a simple, obvious and cute concept:

A lot of coffee beans in a shape of a heart, using 3 colors (the highlight is actually transparent - which works surprisingly well in a range of light-coloured shirts). It was mainly done on my ipad using Illustrator Draw with a (Wacom) Creative Stylus II. Here's the shirt mockup:

Thanks for viewing!