Here's a practical, 3d printable mug which holds your cookies and milk. It looks like cookie monster. You can download the files or make it too.
Step 1: Making the bottom
The easiest way to make is making it in two pieces. In this step we are making the bottom part which holds the cookies.
First of all, you should make a 80mm and a 70mm three-quarter circle and connect the ends together. Then draw another 80mm circle. Extrude the three-quarter circle with 35mm and the single circle with 10mm.