At first glance, you might assume they are just plain, drilled holes. Actually they appear to be bored and have a tiny spike sticking up in the center of the bottom – amazing! This obviously creates more surface area and serves as a great conduit for heat transfer into the thin base.
Aren't those little "spikes" in the center of the cups designed to create turbulence, rather than increase surface area? And how would they serve as a conduit for heat into the thin base? Don't they mean out of the base? And doesn't the heat travel more efficiently through the thin base than the thicker spike? Maybe I just misread previous discussions on jet impingement cooling.
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