RealSimple.com just featured some really awesome ice trays perfect for the Summer! Here are a few of my favorites!
For the musical minded - $9 at SurLaTable.com
Specifically designed for narrow waterbottles - $15 for two SpoonSisters.com
For those who love the aquatic theme - $12 coolstuffexpress.com
This has to be my fave - $9 Amazon