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NASA coffee cup
(lemmy.world)
The Capillary Cup is a zero-gravity cup designed by NASA astronaut Donald Pettit on the International Space Station. The product is an open drinking cup designed to be used in a microgravity environment, developed from Pettit’s desire to drink water without a bag and straw in outer space.
Again, there's no "top" or "bottom" in space. As air enters a rigid container, there is an increasing chance you'll drink the air instead of the liquid, regardless of whether you use a straw.
Gently spin it in a circle