# Is it possible to mix a drink with a non-standard phase of ice?

Would it be possible to safely cool and drink a glass of water with anything else than the Ih form of ice?

Here and here you can see that some alternative forms of ice have a higher density than water, hence they would sink.

Would it be possible to have the coolest party ever, where the attendees would drink from glasses where the ice is sinking instead of floating?

• Not sure about the alternate forms of the ice, but if you can arrange it so nobody drinks from that glass, you can use heavy water to make ice cubes that sink. Pretty cool trick, and you can win some small bets that way. ;) – CoilKid Oct 1 '15 at 0:29
• On a similar note, you may find this interesting (pop-sci article) or this (from his website). In my opinion, that book is totally worth the cost. – CoilKid Oct 1 '15 at 3:06

From the diagrams on the webpages you linked, it appears that other ice phases begin to form at around 200 MPa of pressure, and about $-20\text{C}^{\circ}$. Keep in mind normal water freezes at $0\text{C}^{\circ}$, and air pressure at sea level is around 0.101MPa. That means an ice cube made of one of these phases would sublimate or explode very quickly. If it didn't explode, the water in the cup would probably freeze in pretty short order.