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okay well what i have here is a little

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cup i made from an overhead transparency

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film that i found

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and i'm gonna roll the video now and

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i've also got a bag of coffee and it and

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we can suck our coffee out from a bag

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but don't drink it from a cup it's hard

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to do because you can't pick the cup up

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and get the liquid out and it's also

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easy to slosh

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so with the special shape of this cup

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the surface tension forces will

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wick the coffee up along the edge there

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and as you can see as i'm putting some

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coffee there in the bag

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and the way this works is

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one the cross of this cup looks like an

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airplane wing

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and the sharp angle

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the the the narrow angle there will wick

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the the coffee up and this is what we

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use when we design fuel tanks for

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rockets to reignite in a weightless

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environment the veins in the tanks will

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wick the fluid into the suction port and

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if that angle

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is less than two times 90 minus the

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contact wetting angle then the liquid

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will rise like that so knowing this for

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a fuel tank you can make it into a cup

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and drink your fluid from

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so you could just

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sit there right on the edge of the cup

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and as you sit more fluid just keeps

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coming up and up and up and you can

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enjoy a cup of coffee in a weightless

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environment without having a separate

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from a bag

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and you could just keep dipping and

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sipping and sipping

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clear down to the last drop in the cup

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oh of course i did i mean and this may

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very well be what future space colonists

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end up using when they want to have a

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celebration and do a toast they can uh

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sip their coffee

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and their tea from cups like this like

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we do down here on earth without having

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to suck them from a bag

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i didn't want to take any ceramic up

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here

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or glass so i had god we really enjoyed

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and these advances and you can see i'm

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continuing to suck the coffee out or

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actually sip the coffee because we're no

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longer sucking out of a bag now we're

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we're drinking from a cup

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and the water the coffee continues to

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climb up that acute angle

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and

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good to the last drop

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that's uh the end of the video i wanted

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to share that with you a little

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discovery we made by using a little