Rationalizing this $10 purchase at ThinkGeek meets an early hurdle in the fact that I have a square mug already (an early unrounded version of the legendary Cadbury Dairy Milk Chocolate mug) and am well aware that it is the worst shape for a mug, even worse than triangles (whereby the sharp angles form useful spouts) and perhaps good only for holding nuts.
Ctrl-Alt-Delete Cup Set