From Denny: Did you see this video yet? An astronaut sips coffee from an unusually designed mug to accommodate weightlessness in space. He explains how the mug works to enable an astronaut to drink coffee without resorting to the old school way of sipping out of a plastic bag. They use this mug design for rocket fuel tanks too. Really interesting; take a listen!
NASA space weightless coffee mug fuel tanks rockets technology astronaut video