Half a croissant, on a plate, with a sign in front of it saying '50c'
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light pack

helium powerd light-backpack
  (+2, -6)
(+2, -6)
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against]

think about lugging that huge back-pack around all day, BUT, what if it was light enough to, say, carry with one finger, a regular backpack, only there are giant sacs at the around it that you fill with helium so its as light as a feather.
the extreme baker, Apr 02 2007

[link]






       These would have to be very large and cumbersome sacks.   

       Maybe units lift per unit volume of helium should be in the help file.
Texticle, Apr 02 2007
  

       Weight relieving, helium ideas are old hat.
xenzag, Apr 02 2007
  

       You want to fill a hat with helium? And [texticle], he's obviously going to use compressed helium, durrrr.
MaxwellBuchanan, Apr 02 2007
  

       Not again!   

       The amount of helium you would need to make a backpack near weightless, you'll be toting a blimp around.
DrCurry, Apr 03 2007
  

       This one is almost up there with the lullaballoon!
quantum_flux, Apr 03 2007
  

       And this idea would only work in an environment with no wind.
BJS, Nov 15 2007
  
      
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