Put a small lead ball covered with plastic in with the water when you make ice cubes. The ice cubes will sink to the bottom of your drink.
It's a funny surprise for your guests, a converstaion piece, an icebreaker.
Also it keeps the ice from your lips making the drinking easier.-- zeno, Jul 23 2011 Heavy Water http://en.wikipedia.org/wiki/Heavy_waterDeuterium [csea, Jul 24 2011] Is it possible to make a sugar solution which can be frozen to make heavier-than-water ice cube?
Oooh! Oooh! I just checked, and the density of pure ethanol is 0.79. Water is 1.0, and ice is 0.92.
So, ordinary ice-cubes should sink in a drink which is 50% ethanol (100 proof) or above. I am going to try this in the lab.-- MaxwellBuchanan, Jul 23 2011 Or just make them out of heavy water.-- nick_n_uit, Jul 23 2011 Could simply be made with heavy water [link] in which deuterium replaces the normal Hydrogen. A bit pricey, but certainly an ice-breaker.
(oops, just saw that [nick_n_uit] beat me to it.)-- csea, Jul 24 2011 Dry ice works just fine.muhaha-- 2 fries shy of a happy meal, Jul 24 2011 + for [2_fries]!-- csea, Jul 24 2011 + for MB's veiled alcoholism!-- daseva, Jul 24 2011 [MB], i was thinking sugar glass but either way it would sweeten the drink, which is undesirable. I'm also wondering about using oxygen eighteen with deuterium and freezing it into a denser form than the kind of water ice wherewith we usually come into contact. I think some exotic types of ice are stable on the surface of this planet, but i could be wrong.
Edit: Unfeasible that there would be stable denser types of ice made of ordinary water, but deuterated water with heavy oxygen is twenty- two percent heavier, so frozen it would be heavier than water at the latter's densest point.-- nineteenthly, Jul 24 2011 Use unbreakable glass-- pashute, Jul 24 2011 Only if you've also got unbreakable teeth.-- nineteenthly, Jul 24 2011 Embed a little chain in each cube, with the free end attached to a heavy metal weight or anchor.-- pocmloc, Jul 24 2011 random, halfbakery