Also known as THE Blender Guru project, I carefully followed Andrew Price's doughnut tutorial, and even added the fruit of this project to his subsequent charity collage. Alongside the doughnut came a nice cuppa to go with it, and in my case a few cuppas. This was my first serious attempt at a glass object, complete with contained liquid. It held a few surprises in terms of detail and how you sometimes have to blindside Blender and "cheat" a little, to achieve a visual reality which don't quite meet with the explicit exactness of mathematical modelling.