If you're talking light, that'd be white fabric. If you're talking water, you've got several options, my favorite of which would probably be steel wool.
Nylon fabric.
it absorbs something
black absorbs more heat than other colors because it absorbs wavelees
I don't know which fabric absorbs the *most* sound, but I know that many theaters use crushed velvet, although it is often padded for more absorption.
ur face!
Something purple'ish. Depends on how effective the dye is and how the fabric absorbs the dye.
The dark fabric absorbs heat - which is transferred to the ice cubes, melting them faster.
Nothing
Nothing, the small intestine absorbs the nutrients, and the large intestine absorbs water.
Mesh I think. It would be my choice because it keeps you cool and absorbs sweat. ;)
Nothing, it gives off latent heat of freezing
nothing