A waterbed which uses a water soluble viscous fluid. The viscosity would be adjustable by diluting the fluid with water, or re-introducing the pure viscous fluid.
By adjusting the viscosity of the fluid, you are adjusting how "wavy" the bed is.
note: The fluid is contained within a traditional waterbed lining.
Ammendmants: The mixture would be nearly homogeneous. Closed loop circulation would be enough to maintain the homogeneity.
Mixture expelled during viscosity adjustments would be allowed to seperate by gravity at a reasonable rate for re-use.
New Ammendmant: Anno clarified: The fish could probably do the mixing required to maintain liquid's consitency as they swam about creating turbulance.-- knowtion, Mar 11 2009 Non-Newtonian Bed Non-Newtonian_20Bed [hippo, Mar 12 2009] Dense Liquid Bed Dense_20Liquid_20Bed [hippo, Mar 12 2009] I think this would bother the fish.-- normzone, Mar 11 2009 sounds good... what composition is it again ?-- FlyingToaster, Mar 11 2009 possibly flour dough. Not sure on that one. It would also probably need some internal mixing device (the fish could probably do this too).-- knowtion, Mar 11 2009 sounds messy. even messier would be honey, i suppose.-- k_sra, Mar 11 2009 Many problems, but feasible, advantageous. Almost essential.+ Consider different titles: non newtonian water bed, variable viscosity water bed, sugar water bed, etc. The current title makes me think there's going to be a bunch of worthless knobs and dials, and it's better than that.-- daseva, Mar 11 2009 //a bunch of worthless knobs and dials//
[marked-for-tagline]-- k_sra, Mar 11 2009 Ammended. Now nearly feasible.... <checks the net> Nope, still none on the market...-- knowtion, Mar 11 2009 I like the idea of the homogenius. Gravol! <throws glass of viscous liquid into fireplace>-- bungston, Mar 11 2009 I'd suggest cornstarch, rather than flour.-- goldbb, Mar 11 2009 Custard filled water bed. Someone had to say it.-- spidermother, Mar 12 2009 Someone already did (see links).-- hippo, Mar 12 2009 The cadillac convertable inches forward as I ride high in the back seat. A piece of confetti tickles my nose. A streamer gracefully drapes one of the thousands of applauding hands lining the street.... Lightning crashes. Exodus ensues. And I am soon riding high, soaked in a lone cadillac convertable.
One remaining faithful fan approaches the cadillac and asks for some change. I look him in the eye and say earnestly: "I thought it was an idea original to the halfbakery". He replies: "Whatever", and walks away.-- knowtion, Mar 12 2009 [+], greatly influenced by the best two paragraph fiction I've read in a while.-- Noexit, Mar 12 2009 random, halfbakery