Since I lack the knowledge of the american monetary system (and champagne prices) I calculated it with the dutch values.
One bottle of champagne: 111,- euro for 0,75 liter.
The champagne has a value density of 0.15 euro/ml
The dutch (well, european) coin values are: 2, 1, 0.5, 0.2, 0.1, 0.05, 0.02 and 0.01 euro. The volumes of these coins are 1.15, 0.99, 1.10, 0.83, 0.59, 0.59, 0.46 and 0.35 respectively.
This means that the bottle could best be filled with the 10 cents piece. It has a value density of 0.17 euro/ml. (the next closest values are 0.24 for the 20 cent piece and 0.08 for the 5 cnet piece)
If you fill the bottle with these coins you end up with a little bit overpriced (127 euro) bottle containing 1268 (and a half) coins which weigh 5.20 kilo.
